*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
/**
* You can override this in a plugin.
*
+ * The wp_kses_allowed_html filter is more powerful and supplies context.
+ * CUSTOM_TAGS is not recommended and should be considered deprecated.
+ *
+ * @see wp_kses_allowed_html()
+ *
* @since 1.2.0
*/
if ( ! defined( 'CUSTOM_TAGS' ) )
define( 'CUSTOM_TAGS', false );
+// Ensure that these variables are added to the global namespace
+// (e.g. if using namespaces / autoload in the current PHP environment).
+global $allowedposttags, $allowedtags, $allowedentitynames;
+
if ( ! CUSTOM_TAGS ) {
/**
* Kses global for default allowable HTML tags.
$allowedposttags = array(
'address' => array(),
'a' => array(
- 'class' => array (),
- 'href' => array (),
- 'id' => array (),
- 'title' => array (),
- 'rel' => array (),
- 'rev' => array (),
- 'name' => array (),
- 'target' => array()),
- 'abbr' => array(
- 'class' => array (),
- 'title' => array ()),
- 'acronym' => array(
- 'title' => array ()),
+ 'href' => true,
+ 'rel' => true,
+ 'rev' => true,
+ 'name' => true,
+ 'target' => true,
+ ),
+ 'abbr' => array(),
+ 'acronym' => array(),
+ 'area' => array(
+ 'alt' => true,
+ 'coords' => true,
+ 'href' => true,
+ 'nohref' => true,
+ 'shape' => true,
+ 'target' => true,
+ ),
'article' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'aside' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'audio' => array(
+ 'autoplay' => true,
+ 'controls' => true,
+ 'loop' => true,
+ 'muted' => true,
+ 'preload' => true,
+ 'src' => true,
),
'b' => array(),
+ 'bdo' => array(
+ 'dir' => true,
+ ),
'big' => array(),
'blockquote' => array(
- 'id' => array (),
- 'cite' => array (),
- 'class' => array(),
- 'lang' => array(),
- 'xml:lang' => array()),
- 'br' => array (
- 'class' => array ()),
+ 'cite' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'br' => array(),
'button' => array(
- 'disabled' => array (),
- 'name' => array (),
- 'type' => array (),
- 'value' => array ()),
+ 'disabled' => true,
+ 'name' => true,
+ 'type' => true,
+ 'value' => true,
+ ),
'caption' => array(
- 'align' => array (),
- 'class' => array ()),
- 'cite' => array (
- 'class' => array(),
- 'dir' => array(),
- 'lang' => array(),
- 'title' => array ()),
- 'code' => array (
- 'style' => array()),
+ 'align' => true,
+ ),
+ 'cite' => array(
+ 'dir' => true,
+ 'lang' => true,
+ ),
+ 'code' => array(),
'col' => array(
- 'align' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'span' => array (),
- 'dir' => array(),
- 'style' => array (),
- 'valign' => array (),
- 'width' => array ()),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'span' => true,
+ 'dir' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
+ 'colgroup' => array(
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'span' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
'del' => array(
- 'datetime' => array ()),
+ 'datetime' => true,
+ ),
'dd' => array(),
+ 'dfn' => array(),
'details' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'open' => array (),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'open' => true,
+ 'xml:lang' => true,
),
'div' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array()),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'dl' => array(),
'dt' => array(),
'em' => array(),
'fieldset' => array(),
'figure' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'figcaption' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'font' => array(
- 'color' => array (),
- 'face' => array (),
- 'size' => array ()),
+ 'color' => true,
+ 'face' => true,
+ 'size' => true,
+ ),
'footer' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'form' => array(
- 'action' => array (),
- 'accept' => array (),
- 'accept-charset' => array (),
- 'enctype' => array (),
- 'method' => array (),
- 'name' => array (),
- 'target' => array ()),
+ 'action' => true,
+ 'accept' => true,
+ 'accept-charset' => true,
+ 'enctype' => true,
+ 'method' => true,
+ 'name' => true,
+ 'target' => true,
+ ),
'h1' => array(
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h2' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h3' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h4' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h5' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h6' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
+ 'align' => true,
+ ),
+ 'h2' => array(
+ 'align' => true,
+ ),
+ 'h3' => array(
+ 'align' => true,
+ ),
+ 'h4' => array(
+ 'align' => true,
+ ),
+ 'h5' => array(
+ 'align' => true,
+ ),
+ 'h6' => array(
+ 'align' => true,
+ ),
'header' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'hgroup' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'hr' => array(
+ 'align' => true,
+ 'noshade' => true,
+ 'size' => true,
+ 'width' => true,
),
- 'hr' => array (
- 'align' => array (),
- 'class' => array (),
- 'noshade' => array (),
- 'size' => array (),
- 'width' => array ()),
'i' => array(),
'img' => array(
- 'alt' => array (),
- 'align' => array (),
- 'border' => array (),
- 'class' => array (),
- 'height' => array (),
- 'hspace' => array (),
- 'longdesc' => array (),
- 'vspace' => array (),
- 'src' => array (),
- 'style' => array (),
- 'width' => array ()),
+ 'alt' => true,
+ 'align' => true,
+ 'border' => true,
+ 'height' => true,
+ 'hspace' => true,
+ 'longdesc' => true,
+ 'vspace' => true,
+ 'src' => true,
+ 'usemap' => true,
+ 'width' => true,
+ ),
'ins' => array(
- 'datetime' => array (),
- 'cite' => array ()),
+ 'datetime' => true,
+ 'cite' => true,
+ ),
'kbd' => array(),
'label' => array(
- 'for' => array ()),
+ 'for' => true,
+ ),
'legend' => array(
- 'align' => array ()),
- 'li' => array (
- 'align' => array (),
- 'class' => array ()),
- 'menu' => array (
- 'class' => array (),
- 'style' => array (),
- 'type' => array ()),
+ 'align' => true,
+ ),
+ 'li' => array(
+ 'align' => true,
+ 'value' => true,
+ ),
+ 'map' => array(
+ 'name' => true,
+ ),
+ 'mark' => array(),
+ 'menu' => array(
+ 'type' => true,
+ ),
'nav' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'p' => array(
- 'class' => array (),
- 'align' => array (),
- 'dir' => array(),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array()),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'pre' => array(
- 'style' => array(),
- 'width' => array ()),
+ 'width' => true,
+ ),
'q' => array(
- 'cite' => array ()),
+ 'cite' => true,
+ ),
's' => array(),
- 'span' => array (
- 'class' => array (),
- 'dir' => array (),
- 'align' => array (),
- 'lang' => array (),
- 'style' => array (),
- 'title' => array (),
- 'xml:lang' => array()),
+ 'samp' => array(),
+ 'span' => array(
+ 'dir' => true,
+ 'align' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'section' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
+ 'small' => array(),
'strike' => array(),
'strong' => array(),
'sub' => array(),
'summary' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'sup' => array(),
'table' => array(
- 'align' => array (),
- 'bgcolor' => array (),
- 'border' => array (),
- 'cellpadding' => array (),
- 'cellspacing' => array (),
- 'class' => array (),
- 'dir' => array(),
- 'id' => array(),
- 'rules' => array (),
- 'style' => array (),
- 'summary' => array (),
- 'width' => array ()),
+ 'align' => true,
+ 'bgcolor' => true,
+ 'border' => true,
+ 'cellpadding' => true,
+ 'cellspacing' => true,
+ 'dir' => true,
+ 'rules' => true,
+ 'summary' => true,
+ 'width' => true,
+ ),
'tbody' => array(
- 'align' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'valign' => array ()),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
'td' => array(
- 'abbr' => array (),
- 'align' => array (),
- 'axis' => array (),
- 'bgcolor' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'class' => array (),
- 'colspan' => array (),
- 'dir' => array(),
- 'headers' => array (),
- 'height' => array (),
- 'nowrap' => array (),
- 'rowspan' => array (),
- 'scope' => array (),
- 'style' => array (),
- 'valign' => array (),
- 'width' => array ()),
+ 'abbr' => true,
+ 'align' => true,
+ 'axis' => true,
+ 'bgcolor' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'colspan' => true,
+ 'dir' => true,
+ 'headers' => true,
+ 'height' => true,
+ 'nowrap' => true,
+ 'rowspan' => true,
+ 'scope' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
'textarea' => array(
- 'cols' => array (),
- 'rows' => array (),
- 'disabled' => array (),
- 'name' => array (),
- 'readonly' => array ()),
+ 'cols' => true,
+ 'rows' => true,
+ 'disabled' => true,
+ 'name' => true,
+ 'readonly' => true,
+ ),
'tfoot' => array(
- 'align' => array (),
- 'char' => array (),
- 'class' => array (),
- 'charoff' => array (),
- 'valign' => array ()),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
'th' => array(
- 'abbr' => array (),
- 'align' => array (),
- 'axis' => array (),
- 'bgcolor' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'class' => array (),
- 'colspan' => array (),
- 'headers' => array (),
- 'height' => array (),
- 'nowrap' => array (),
- 'rowspan' => array (),
- 'scope' => array (),
- 'valign' => array (),
- 'width' => array ()),
+ 'abbr' => true,
+ 'align' => true,
+ 'axis' => true,
+ 'bgcolor' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'colspan' => true,
+ 'headers' => true,
+ 'height' => true,
+ 'nowrap' => true,
+ 'rowspan' => true,
+ 'scope' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
'thead' => array(
- 'align' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'class' => array (),
- 'valign' => array ()),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
'title' => array(),
'tr' => array(
- 'align' => array (),
- 'bgcolor' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'class' => array (),
- 'style' => array (),
- 'valign' => array ()),
+ 'align' => true,
+ 'bgcolor' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
+ 'track' => array(
+ 'default' => true,
+ 'kind' => true,
+ 'label' => true,
+ 'src' => true,
+ 'srclang' => true,
+ ),
'tt' => array(),
'u' => array(),
- 'ul' => array (
- 'class' => array (),
- 'style' => array (),
- 'type' => array ()),
- 'ol' => array (
- 'class' => array (),
- 'start' => array (),
- 'style' => array (),
- 'type' => array ()),
- 'var' => array ());
+ 'ul' => array(
+ 'type' => true,
+ ),
+ 'ol' => array(
+ 'start' => true,
+ 'type' => true,
+ 'reversed' => true,
+ ),
+ 'var' => array(),
+ 'video' => array(
+ 'autoplay' => true,
+ 'controls' => true,
+ 'height' => true,
+ 'loop' => true,
+ 'muted' => true,
+ 'poster' => true,
+ 'preload' => true,
+ 'src' => true,
+ 'width' => true,
+ ),
+ );
/**
* Kses allowed HTML elements.
*/
$allowedtags = array(
'a' => array(
- 'href' => array (),
- 'title' => array ()),
+ 'href' => true,
+ 'title' => true,
+ ),
'abbr' => array(
- 'title' => array ()),
+ 'title' => true,
+ ),
'acronym' => array(
- 'title' => array ()),
+ 'title' => true,
+ ),
'b' => array(),
'blockquote' => array(
- 'cite' => array ()),
- // 'br' => array(),
- 'cite' => array (),
+ 'cite' => true,
+ ),
+ 'cite' => array(),
'code' => array(),
'del' => array(
- 'datetime' => array ()),
- // 'dd' => array(),
- // 'dl' => array(),
- // 'dt' => array(),
- 'em' => array (), 'i' => array (),
- // 'ins' => array('datetime' => array(), 'cite' => array()),
- // 'li' => array(),
- // 'ol' => array(),
- // 'p' => array(),
+ 'datetime' => true,
+ ),
+ 'em' => array(),
+ 'i' => array(),
'q' => array(
- 'cite' => array ()),
+ 'cite' => true,
+ ),
+ 's' => array(),
'strike' => array(),
'strong' => array(),
- // 'sub' => array(),
- // 'sup' => array(),
- // 'u' => array(),
- // 'ul' => array(),
);
$allowedentitynames = array(
'nsub', 'sube', 'supe', 'oplus', 'otimes', 'perp',
'sdot', 'lceil', 'rceil', 'lfloor', 'rfloor', 'lang',
'rang', 'loz', 'spades', 'clubs', 'hearts', 'diams',
+ 'sup1', 'sup2', 'sup3', 'frac14', 'frac12', 'frac34',
+ 'there4',
);
+
+ $allowedposttags = array_map( '_wp_add_global_attributes', $allowedposttags );
+} else {
+ $allowedtags = wp_kses_array_lc( $allowedtags );
+ $allowedposttags = wp_kses_array_lc( $allowedposttags );
}
/**
*
* @since 1.0.0
*
- * @param string $string Content to filter through kses
- * @param array $allowed_html List of allowed HTML elements
- * @param array $allowed_protocols Optional. Allowed protocol in links.
+ * @param string $string Content to filter through kses
+ * @param array $allowed_html List of allowed HTML elements
+ * @param array $allowed_protocols Optional. Allowed protocol in links.
* @return string Filtered content with only allowed HTML elements
*/
-function wp_kses($string, $allowed_html, $allowed_protocols = array ()) {
+function wp_kses( $string, $allowed_html, $allowed_protocols = array() ) {
if ( empty( $allowed_protocols ) )
$allowed_protocols = wp_allowed_protocols();
- $string = wp_kses_no_null($string);
+ $string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
$string = wp_kses_js_entities($string);
$string = wp_kses_normalize_entities($string);
- $allowed_html_fixed = wp_kses_array_lc($allowed_html);
- $string = wp_kses_hook($string, $allowed_html_fixed, $allowed_protocols); // WP changed the order of these funcs and added args to wp_kses_hook
- return wp_kses_split($string, $allowed_html_fixed, $allowed_protocols);
+ $string = wp_kses_hook($string, $allowed_html, $allowed_protocols); // WP changed the order of these funcs and added args to wp_kses_hook
+ return wp_kses_split($string, $allowed_html, $allowed_protocols);
+}
+
+/**
+ * Filters one attribute only and ensures its value is allowed.
+ *
+ * This function has the advantage of being more secure than esc_attr() and can
+ * escape data in some situations where wp_kses() must strip the whole attribute.
+ *
+ * @since 4.2.3
+ *
+ * @param string $string The 'whole' attribute, including name and value.
+ * @param string $element The element name to which the attribute belongs.
+ * @return string Filtered attribute.
+ */
+function wp_kses_one_attr( $string, $element ) {
+ $uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
+ $allowed_html = wp_kses_allowed_html( 'post' );
+ $allowed_protocols = wp_allowed_protocols();
+ $string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
+ $string = wp_kses_js_entities( $string );
+
+ // Preserve leading and trailing whitespace.
+ $matches = array();
+ preg_match('/^\s*/', $string, $matches);
+ $lead = $matches[0];
+ preg_match('/\s*$/', $string, $matches);
+ $trail = $matches[0];
+ if ( empty( $trail ) ) {
+ $string = substr( $string, strlen( $lead ) );
+ } else {
+ $string = substr( $string, strlen( $lead ), -strlen( $trail ) );
+ }
+
+ // Parse attribute name and value from input.
+ $split = preg_split( '/\s*=\s*/', $string, 2 );
+ $name = $split[0];
+ if ( count( $split ) == 2 ) {
+ $value = $split[1];
+
+ // Remove quotes surrounding $value.
+ // Also guarantee correct quoting in $string for this one attribute.
+ if ( '' == $value ) {
+ $quote = '';
+ } else {
+ $quote = $value[0];
+ }
+ if ( '"' == $quote || "'" == $quote ) {
+ if ( substr( $value, -1 ) != $quote ) {
+ return '';
+ }
+ $value = substr( $value, 1, -1 );
+ } else {
+ $quote = '"';
+ }
+
+ // Sanitize quotes, angle braces, and entities.
+ $value = esc_attr( $value );
+
+ // Sanitize URI values.
+ if ( in_array( strtolower( $name ), $uris ) ) {
+ $value = wp_kses_bad_protocol( $value, $allowed_protocols );
+ }
+
+ $string = "$name=$quote$value$quote";
+ $vless = 'n';
+ } else {
+ $value = '';
+ $vless = 'y';
+ }
+
+ // Sanitize attribute by name.
+ wp_kses_attr_check( $name, $value, $string, $vless, $element, $allowed_html );
+
+ // Restore whitespace.
+ return $lead . $string . $trail;
+}
+
+/**
+ * Return a list of allowed tags and attributes for a given context.
+ *
+ * @since 3.5.0
+ *
+ * @global array $allowedposttags
+ * @global array $allowedtags
+ * @global array $allowedentitynames
+ *
+ * @param string $context The context for which to retrieve tags.
+ * Allowed values are post, strip, data,entities, or
+ * the name of a field filter such as pre_user_description.
+ * @return array List of allowed tags and their allowed attributes.
+ */
+function wp_kses_allowed_html( $context = '' ) {
+ global $allowedposttags, $allowedtags, $allowedentitynames;
+
+ if ( is_array( $context ) ) {
+ /**
+ * Filter HTML elements allowed for a given context.
+ *
+ * @since 3.5.0
+ *
+ * @param string $tags Allowed tags, attributes, and/or entities.
+ * @param string $context Context to judge allowed tags by. Allowed values are 'post',
+ * 'data', 'strip', 'entities', 'explicit', or the name of a filter.
+ */
+ return apply_filters( 'wp_kses_allowed_html', $context, 'explicit' );
+ }
+
+ switch ( $context ) {
+ case 'post':
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $allowedposttags, $context );
+
+ case 'user_description':
+ case 'pre_user_description':
+ $tags = $allowedtags;
+ $tags['a']['rel'] = true;
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $tags, $context );
+
+ case 'strip':
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', array(), $context );
+
+ case 'entities':
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $allowedentitynames, $context);
+
+ case 'data':
+ default:
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $allowedtags, $context );
+ }
}
/**
*
* @since 1.0.0
*
- * @param string $string Content to filter through kses
- * @param array $allowed_html List of allowed HTML elements
- * @param array $allowed_protocols Allowed protocol in links
+ * @param string $string Content to filter through kses
+ * @param array $allowed_html List of allowed HTML elements
+ * @param array $allowed_protocols Allowed protocol in links
* @return string Filtered content through 'pre_kses' hook
*/
-function wp_kses_hook($string, $allowed_html, $allowed_protocols) {
- $string = apply_filters('pre_kses', $string, $allowed_html, $allowed_protocols);
- return $string;
+function wp_kses_hook( $string, $allowed_html, $allowed_protocols ) {
+ /**
+ * Filter content to be run through kses.
+ *
+ * @since 2.3.0
+ *
+ * @param string $string Content to run through kses.
+ * @param array $allowed_html Allowed HTML elements.
+ * @param array $allowed_protocols Allowed protocol in links.
+ */
+ return apply_filters( 'pre_kses', $string, $allowed_html, $allowed_protocols );
}
/**
*
* @since 1.0.0
*
- * @param string $string Content to filter
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
+ * @global array $pass_allowed_html
+ * @global array $pass_allowed_protocols
+ *
+ * @param string $string Content to filter
+ * @param array $allowed_html Allowed HTML elements
+ * @param array $allowed_protocols Allowed protocols to keep
* @return string Content with fixed HTML tags
*/
-function wp_kses_split($string, $allowed_html, $allowed_protocols) {
+function wp_kses_split( $string, $allowed_html, $allowed_protocols ) {
global $pass_allowed_html, $pass_allowed_protocols;
$pass_allowed_html = $allowed_html;
$pass_allowed_protocols = $allowed_protocols;
*
* @since 3.1.0
* @access private
+ *
+ * @global array $pass_allowed_html
+ * @global array $pass_allowed_protocols
+ *
+ * @return string
*/
function _wp_kses_split_callback( $match ) {
global $pass_allowed_html, $pass_allowed_protocols;
*
* @access private
* @since 1.0.0
- * @uses wp_kses_attr()
*
- * @param string $string Content to filter
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
+ * @param string $string Content to filter
+ * @param array $allowed_html Allowed HTML elements
+ * @param array $allowed_protocols Allowed protocols to keep
* @return string Fixed HTML element
*/
function wp_kses_split2($string, $allowed_html, $allowed_protocols) {
if (substr($string, 0, 1) != '<')
return '>';
- # It matched a ">" character
+ // It matched a ">" character
if ( '<!--' == substr( $string, 0, 4 ) ) {
$string = str_replace( array('<!--', '-->'), '', $string );
$string = preg_replace('/-$/', '', $string);
return "<!--{$string}-->";
}
- # Allow HTML comments
+ // Allow HTML comments
if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches))
return '';
- # It's seriously malformed
+ // It's seriously malformed
$slash = trim($matches[1]);
$elem = $matches[2];
$attrlist = $matches[3];
+ if ( ! is_array( $allowed_html ) )
+ $allowed_html = wp_kses_allowed_html( $allowed_html );
+
if ( ! isset($allowed_html[strtolower($elem)]) )
return '';
- # They are using a not allowed HTML element
+ // They are using a not allowed HTML element
if ($slash != '')
return "</$elem>";
- # No attributes are allowed for closing elements
+ // No attributes are allowed for closing elements
return wp_kses_attr( $elem, $attrlist, $allowed_html, $allowed_protocols );
}
*
* @since 1.0.0
*
- * @param string $element HTML element/tag
- * @param string $attr HTML attributes from HTML element to closing HTML element tag
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
+ * @param string $element HTML element/tag
+ * @param string $attr HTML attributes from HTML element to closing HTML element tag
+ * @param array $allowed_html Allowed HTML elements
+ * @param array $allowed_protocols Allowed protocols to keep
* @return string Sanitized HTML element
*/
function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
- # Is there a closing XHTML slash at the end of the attributes?
+ if ( ! is_array( $allowed_html ) )
+ $allowed_html = wp_kses_allowed_html( $allowed_html );
+ // Is there a closing XHTML slash at the end of the attributes?
$xhtml_slash = '';
if (preg_match('%\s*/\s*$%', $attr))
$xhtml_slash = ' /';
- # Are any attributes allowed at all for this element?
+ // Are any attributes allowed at all for this element?
if ( ! isset($allowed_html[strtolower($element)]) || count($allowed_html[strtolower($element)]) == 0 )
return "<$element$xhtml_slash>";
- # Split it
+ // Split it
$attrarr = wp_kses_hair($attr, $allowed_protocols);
- # Go through $attrarr, and save the allowed attributes for this element
- # in $attr2
+ // Go through $attrarr, and save the allowed attributes for this element
+ // in $attr2
$attr2 = '';
+ foreach ( $attrarr as $arreach ) {
+ if ( wp_kses_attr_check( $arreach['name'], $arreach['value'], $arreach['whole'], $arreach['vless'], $element, $allowed_html ) ) {
+ $attr2 .= ' '.$arreach['whole'];
+ }
+ }
- $allowed_attr = $allowed_html[strtolower($element)];
- foreach ($attrarr as $arreach) {
- if ( ! isset( $allowed_attr[strtolower($arreach['name'])] ) )
- continue; # the attribute is not allowed
-
- $current = $allowed_attr[strtolower($arreach['name'])];
- if ( $current == '' )
- continue; # the attribute is not allowed
+ // Remove any "<" or ">" characters
+ $attr2 = preg_replace('/[<>]/', '', $attr2);
- if ( ! is_array($current) ) {
- $attr2 .= ' '.$arreach['whole'];
- # there are no checks
+ return "<$element$attr2$xhtml_slash>";
+}
- } else {
- # there are some checks
- $ok = true;
- foreach ($current as $currkey => $currval) {
- if ( ! wp_kses_check_attr_val($arreach['value'], $arreach['vless'], $currkey, $currval) ) {
- $ok = false;
- break;
- }
- }
+/**
+ * Determine whether an attribute is allowed.
+ *
+ * @since 4.2.3
+ *
+ * @param string $name The attribute name. Returns empty string when not allowed.
+ * @param string $value The attribute value. Returns a filtered value.
+ * @param string $whole The name=value input. Returns filtered input.
+ * @param string $vless 'y' when attribute like "enabled", otherwise 'n'.
+ * @param string $element The name of the element to which this attribute belongs.
+ * @param array $allowed_html The full list of allowed elements and attributes.
+ * @return bool Is the attribute allowed?
+ */
+function wp_kses_attr_check( &$name, &$value, &$whole, $vless, $element, $allowed_html ) {
+ $allowed_attr = $allowed_html[strtolower( $element )];
- if ( strtolower($arreach['name']) == 'style' ) {
- $orig_value = $arreach['value'];
- $value = safecss_filter_attr($orig_value);
+ $name_low = strtolower( $name );
+ if ( ! isset( $allowed_attr[$name_low] ) || '' == $allowed_attr[$name_low] ) {
+ $name = $value = $whole = '';
+ return false;
+ }
- if ( empty($value) )
- continue;
+ if ( 'style' == $name_low ) {
+ $new_value = safecss_filter_attr( $value );
- $arreach['value'] = $value;
- $arreach['whole'] = str_replace($orig_value, $value, $arreach['whole']);
- }
+ if ( empty( $new_value ) ) {
+ $name = $value = $whole = '';
+ return false;
+ }
- if ($ok)
- $attr2 .= ' '.$arreach['whole']; # it passed them
- } # if !is_array($current)
- } # foreach
+ $whole = str_replace( $value, $new_value, $whole );
+ $value = $new_value;
+ }
- # Remove any "<" or ">" characters
- $attr2 = preg_replace('/[<>]/', '', $attr2);
+ if ( is_array( $allowed_attr[$name_low] ) ) {
+ // there are some checks
+ foreach ( $allowed_attr[$name_low] as $currkey => $currval ) {
+ if ( ! wp_kses_check_attr_val( $value, $vless, $currkey, $currval ) ) {
+ $name = $value = $whole = '';
+ return false;
+ }
+ }
+ }
- return "<$element$attr2$xhtml_slash>";
+ return true;
}
/**
* input. It will add quotes around attribute values that don't have any quotes
* or apostrophes around them, to make it easier to produce HTML code that will
* conform to W3C's HTML specification. It will also remove bad URL protocols
- * from attribute values. It also reduces duplicate attributes by using the
+ * from attribute values. It also reduces duplicate attributes by using the
* attribute defined first (foo='bar' foo='baz' will result in foo='bar').
*
* @since 1.0.0
*
- * @param string $attr Attribute list from HTML element to closing HTML element tag
- * @param array $allowed_protocols Allowed protocols to keep
+ * @param string $attr Attribute list from HTML element to closing HTML element tag
+ * @param array $allowed_protocols Allowed protocols to keep
* @return array List of attributes after parsing
*/
function wp_kses_hair($attr, $allowed_protocols) {
- $attrarr = array ();
+ $attrarr = array();
$mode = 0;
$attrname = '';
$uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
- # Loop through the whole attribute list
+ // Loop through the whole attribute list
while (strlen($attr) != 0) {
- $working = 0; # Was the last operation successful?
+ $working = 0; // Was the last operation successful?
switch ($mode) {
- case 0 : # attribute name, href for instance
+ case 0 : // attribute name, href for instance
- if (preg_match('/^([-a-zA-Z]+)/', $attr, $match)) {
+ if ( preg_match('/^([-a-zA-Z:]+)/', $attr, $match ) ) {
$attrname = $match[1];
$working = $mode = 1;
- $attr = preg_replace('/^[-a-zA-Z]+/', '', $attr);
+ $attr = preg_replace( '/^[-a-zA-Z:]+/', '', $attr );
}
break;
- case 1 : # equals sign or valueless ("selected")
+ case 1 : // equals sign or valueless ("selected")
- if (preg_match('/^\s*=\s*/', $attr)) # equals sign
+ if (preg_match('/^\s*=\s*/', $attr)) // equals sign
{
$working = 1;
$mode = 2;
break;
}
- if (preg_match('/^\s+/', $attr)) # valueless
+ if (preg_match('/^\s+/', $attr)) // valueless
{
$working = 1;
$mode = 0;
- if(FALSE === array_key_exists($attrname, $attrarr)) {
+ if(false === array_key_exists($attrname, $attrarr)) {
$attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
}
$attr = preg_replace('/^\s+/', '', $attr);
break;
- case 2 : # attribute value, a URL after href= for instance
+ case 2 : // attribute value, a URL after href= for instance
if (preg_match('%^"([^"]*)"(\s+|/?$)%', $attr, $match))
- # "value"
+ // "value"
{
$thisval = $match[1];
if ( in_array(strtolower($attrname), $uris) )
$thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- if(FALSE === array_key_exists($attrname, $attrarr)) {
+ if(false === array_key_exists($attrname, $attrarr)) {
$attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
}
$working = 1;
}
if (preg_match("%^'([^']*)'(\s+|/?$)%", $attr, $match))
- # 'value'
+ // 'value'
{
$thisval = $match[1];
if ( in_array(strtolower($attrname), $uris) )
$thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- if(FALSE === array_key_exists($attrname, $attrarr)) {
+ if(false === array_key_exists($attrname, $attrarr)) {
$attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname='$thisval'", 'vless' => 'n');
}
$working = 1;
}
if (preg_match("%^([^\s\"']+)(\s+|/?$)%", $attr, $match))
- # value
+ // value
{
$thisval = $match[1];
if ( in_array(strtolower($attrname), $uris) )
$thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- if(FALSE === array_key_exists($attrname, $attrarr)) {
+ if(false === array_key_exists($attrname, $attrarr)) {
$attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
}
- # We add quotes to conform to W3C's HTML spec.
+ // We add quotes to conform to W3C's HTML spec.
$working = 1;
$mode = 0;
$attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr);
}
break;
- } # switch
+ } // switch
- if ($working == 0) # not well formed, remove and try again
+ if ($working == 0) // not well formed, remove and try again
{
$attr = wp_kses_html_error($attr);
$mode = 0;
}
- } # while
+ } // while
- if ($mode == 1 && FALSE === array_key_exists($attrname, $attrarr))
- # special case, for when the attribute list ends with a valueless
- # attribute like "selected"
+ if ($mode == 1 && false === array_key_exists($attrname, $attrarr))
+ // special case, for when the attribute list ends with a valueless
+ // attribute like "selected"
$attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
return $attrarr;
}
+/**
+ * Finds all attributes of an HTML element.
+ *
+ * Does not modify input. May return "evil" output.
+ *
+ * Based on wp_kses_split2() and wp_kses_attr()
+ *
+ * @since 4.2.3
+ *
+ * @param string $element HTML element/tag
+ * @return array|bool List of attributes found in $element. Returns false on failure.
+ */
+function wp_kses_attr_parse( $element ) {
+ $valid = preg_match('%^(<\s*)(/\s*)?([a-zA-Z0-9]+\s*)([^>]*)(>?)$%', $element, $matches);
+ if ( 1 !== $valid ) {
+ return false;
+ }
+
+ $begin = $matches[1];
+ $slash = $matches[2];
+ $elname = $matches[3];
+ $attr = $matches[4];
+ $end = $matches[5];
+
+ if ( '' !== $slash ) {
+ // Closing elements do not get parsed.
+ return false;
+ }
+
+ // Is there a closing XHTML slash at the end of the attributes?
+ if ( 1 === preg_match( '%\s*/\s*$%', $attr, $matches ) ) {
+ $xhtml_slash = $matches[0];
+ $attr = substr( $attr, 0, -strlen( $xhtml_slash ) );
+ } else {
+ $xhtml_slash = '';
+ }
+
+ // Split it
+ $attrarr = wp_kses_hair_parse( $attr );
+ if ( false === $attrarr ) {
+ return false;
+ }
+
+ // Make sure all input is returned by adding front and back matter.
+ array_unshift( $attrarr, $begin . $slash . $elname );
+ array_push( $attrarr, $xhtml_slash . $end );
+
+ return $attrarr;
+}
+
+/**
+ * Builds an attribute list from string containing attributes.
+ *
+ * Does not modify input. May return "evil" output.
+ * In case of unexpected input, returns false instead of stripping things.
+ *
+ * Based on wp_kses_hair() but does not return a multi-dimensional array.
+ *
+ * @since 4.2.3
+ *
+ * @param string $attr Attribute list from HTML element to closing HTML element tag
+ * @return array|bool List of attributes found in $attr. Returns false on failure.
+ */
+function wp_kses_hair_parse( $attr ) {
+ if ( '' === $attr ) {
+ return array();
+ }
+
+ $regex =
+ '(?:'
+ . '[-a-zA-Z:]+' // Attribute name.
+ . '|'
+ . '\[\[?[^\[\]]+\]\]?' // Shortcode in the name position implies unfiltered_html.
+ . ')'
+ . '(?:' // Attribute value.
+ . '\s*=\s*' // All values begin with '='
+ . '(?:'
+ . '"[^"]*"' // Double-quoted
+ . '|'
+ . "'[^']*'" // Single-quoted
+ . '|'
+ . '[^\s"\']+' // Non-quoted
+ . '(?:\s|$)' // Must have a space
+ . ')'
+ . '|'
+ . '(?:\s|$)' // If attribute has no value, space is required.
+ . ')'
+ . '\s*'; // Trailing space is optional except as mentioned above.
+
+ // Although it is possible to reduce this procedure to a single regexp,
+ // we must run that regexp twice to get exactly the expected result.
+
+ $validation = "%^($regex)+$%";
+ $extraction = "%$regex%";
+
+ if ( 1 === preg_match( $validation, $attr ) ) {
+ preg_match_all( $extraction, $attr, $attrarr );
+ return $attrarr[0];
+ } else {
+ return false;
+ }
+}
+
/**
* Performs different checks for attribute values.
*
*
* @since 1.0.0
*
- * @param string $value Attribute value
- * @param string $vless Whether the value is valueless. Use 'y' or 'n'
- * @param string $checkname What $checkvalue is checking for.
- * @param mixed $checkvalue What constraint the value should pass
+ * @param string $value Attribute value
+ * @param string $vless Whether the value is valueless. Use 'y' or 'n'
+ * @param string $checkname What $checkvalue is checking for.
+ * @param mixed $checkvalue What constraint the value should pass
* @return bool Whether check passes
*/
function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue) {
switch (strtolower($checkname)) {
case 'maxlen' :
- # The maxlen check makes sure that the attribute value has a length not
- # greater than the given value. This can be used to avoid Buffer Overflows
- # in WWW clients and various Internet servers.
+ // The maxlen check makes sure that the attribute value has a length not
+ // greater than the given value. This can be used to avoid Buffer Overflows
+ // in WWW clients and various Internet servers.
if (strlen($value) > $checkvalue)
$ok = false;
break;
case 'minlen' :
- # The minlen check makes sure that the attribute value has a length not
- # smaller than the given value.
+ // The minlen check makes sure that the attribute value has a length not
+ // smaller than the given value.
if (strlen($value) < $checkvalue)
$ok = false;
break;
case 'maxval' :
- # The maxval check does two things: it checks that the attribute value is
- # an integer from 0 and up, without an excessive amount of zeroes or
- # whitespace (to avoid Buffer Overflows). It also checks that the attribute
- # value is not greater than the given value.
- # This check can be used to avoid Denial of Service attacks.
+ // The maxval check does two things: it checks that the attribute value is
+ // an integer from 0 and up, without an excessive amount of zeroes or
+ // whitespace (to avoid Buffer Overflows). It also checks that the attribute
+ // value is not greater than the given value.
+ // This check can be used to avoid Denial of Service attacks.
if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
$ok = false;
break;
case 'minval' :
- # The minval check makes sure that the attribute value is a positive integer,
- # and that it is not smaller than the given value.
+ // The minval check makes sure that the attribute value is a positive integer,
+ // and that it is not smaller than the given value.
if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
$ok = false;
break;
case 'valueless' :
- # The valueless check makes sure if the attribute has a value
-
# (like <a href="blah">) or not (<option selected>). If the given value
- # is a "y" or a "Y", the attribute must not have a value.
- # If the given value is an "n" or an "N", the attribute must have one.
+ // The valueless check makes sure if the attribute has a value
+
// (like <a href="blah">) or not (<option selected>). If the given value
+ // is a "y" or a "Y", the attribute must not have a value.
+ // If the given value is an "n" or an "N", the attribute must have one.
if (strtolower($checkvalue) != $vless)
$ok = false;
break;
- } # switch
+ } // switch
return $ok;
}
*
* @since 1.0.0
*
- * @param string $string Content to filter bad protocols from
- * @param array $allowed_protocols Allowed protocols to keep
+ * @param string $string Content to filter bad protocols from
+ * @param array $allowed_protocols Allowed protocols to keep
* @return string Filtered content
*/
function wp_kses_bad_protocol($string, $allowed_protocols) {
$string = wp_kses_no_null($string);
- $string2 = $string.'a';
+ $iterations = 0;
- while ($string != $string2) {
- $string2 = $string;
+ do {
+ $original_string = $string;
$string = wp_kses_bad_protocol_once($string, $allowed_protocols);
- } # while
+ } while ( $original_string != $string && ++$iterations < 6 );
+
+ if ( $original_string != $string )
+ return '';
return $string;
}
/**
- * Removes any NULL characters in $string.
+ * Removes any invalid control characters in $string.
+ *
+ * Also removes any instance of the '\0' string.
*
* @since 1.0.0
*
* @param string $string
+ * @param array $options Set 'slash_zero' => 'keep' when '\0' is allowed. Default is 'remove'.
* @return string
*/
-function wp_kses_no_null($string) {
- $string = preg_replace('/\0+/', '', $string);
- $string = preg_replace('/(\\\\0)+/', '', $string);
+function wp_kses_no_null( $string, $options = null ) {
+ if ( ! isset( $options['slash_zero'] ) ) {
+ $options = array( 'slash_zero' => 'remove' );
+ }
+
+ $string = preg_replace( '/[\x00-\x08\x0B\x0C\x0E-\x1F]/', '', $string );
+ if ( 'remove' == $options['slash_zero'] ) {
+ $string = preg_replace( '/\\\\+0+/', '', $string );
+ }
return $string;
}
foreach ( (array) $inval as $inkey2 => $inval2) {
$outkey2 = strtolower($inkey2);
$outarray[$outkey][$outkey2] = $inval2;
- } # foreach $inval
- } # foreach $inarray
+ } // foreach $inval
+ } // foreach $inarray
return $outarray;
}
*
* @since 1.0.0
*
- * @param string $string Content to check for bad protocols
+ * @param string $string Content to check for bad protocols
* @param string $allowed_protocols Allowed protocols
* @return string Sanitized content
*/
-function wp_kses_bad_protocol_once($string, $allowed_protocols) {
+function wp_kses_bad_protocol_once($string, $allowed_protocols, $count = 1 ) {
$string2 = preg_split( '/:|�*58;|�*3a;/i', $string, 2 );
- if ( isset($string2[1]) && ! preg_match('%/\?%', $string2[0]) )
- $string = wp_kses_bad_protocol_once2( $string2[0], $allowed_protocols ) . trim( $string2[1] );
+ if ( isset($string2[1]) && ! preg_match('%/\?%', $string2[0]) ) {
+ $string = trim( $string2[1] );
+ $protocol = wp_kses_bad_protocol_once2( $string2[0], $allowed_protocols );
+ if ( 'feed:' == $protocol ) {
+ if ( $count > 2 )
+ return '';
+ $string = wp_kses_bad_protocol_once( $string, $allowed_protocols, ++$count );
+ if ( empty( $string ) )
+ return $string;
+ }
+ $string = $protocol . $string;
+ }
return $string;
}
* @access private
* @since 1.0.0
*
- * @param string $string URI scheme to check against the whitelist
+ * @param string $string URI scheme to check against the whitelist
* @param string $allowed_protocols Allowed protocols
* @return string Sanitized content
*/
/**
* Converts and fixes HTML entities.
*
- * This function normalizes HTML entities. It will convert "AT&T" to the correct
- * "AT&T", ":" to ":", "&#XYZZY;" to "&#XYZZY;" and so on.
+ * This function normalizes HTML entities. It will convert `AT&T` to the correct
+ * `AT&T`, `:` to `:`, `&#XYZZY;` to `&#XYZZY;` and so on.
*
* @since 1.0.0
*
* @return string Content with normalized entities
*/
function wp_kses_normalize_entities($string) {
- # Disarm all entities by converting & to &
-
+ // Disarm all entities by converting & to &
$string = str_replace('&', '&', $string);
- # Change back the allowed entities in our entity whitelist
-
- $string = preg_replace_callback('/&([A-Za-z]{2,8});/', 'wp_kses_named_entities', $string);
+ // Change back the allowed entities in our entity whitelist
+ $string = preg_replace_callback('/&([A-Za-z]{2,8}[0-9]{0,2});/', 'wp_kses_named_entities', $string);
$string = preg_replace_callback('/&#(0*[0-9]{1,7});/', 'wp_kses_normalize_entities2', $string);
$string = preg_replace_callback('/&#[Xx](0*[0-9A-Fa-f]{1,6});/', 'wp_kses_normalize_entities3', $string);
*
* @since 3.0.0
*
+ * @global array $allowedentitynames
+ *
* @param array $matches preg_replace_callback() matches array
* @return string Correctly encoded entity
*/
return '';
$i = $matches[1];
- return ( ( ! in_array($i, $allowedentitynames) ) ? "&$i;" : "&$i;" );
+ return ( ! in_array( $i, $allowedentitynames ) ) ? "&$i;" : "&$i;";
}
/**
* Callback for wp_kses_normalize_entities() regular expression.
*
- * This function helps wp_kses_normalize_entities() to only accept 16-bit values
- * and nothing more for &#number; entities.
+ * This function helps {@see wp_kses_normalize_entities()} to only accept 16-bit
+ * values and nothing more for `&#number;` entities.
*
* @access private
* @since 1.0.0
return '';
$hexchars = $matches[1];
- return ( ( ! valid_unicode(hexdec($hexchars)) ) ? "&#x$hexchars;" : '&#x'.ltrim($hexchars,'0').';' );
+ return ( ! valid_unicode( hexdec( $hexchars ) ) ) ? "&#x$hexchars;" : '&#x'.ltrim($hexchars,'0').';';
}
/**
/**
* Convert all entities to their character counterparts.
*
- * This function decodes numeric HTML entities (A and A). It doesn't do
- * anything with other entities like ä, but we don't need them in the URL
- * protocol whitelisting system anyway.
+ * This function decodes numeric HTML entities (`A` and `A`).
+ * It doesn't do anything with other entities like ä, but we don't
+ * need them in the URL protocol whitelisting system anyway.
*
* @since 1.0.0
*
* Sanitize content with allowed HTML Kses rules.
*
* @since 1.0.0
- * @uses $allowedtags
*
* @param string $data Content to filter, expected to be escaped with slashes
* @return string Filtered content
*/
-function wp_filter_kses($data) {
- global $allowedtags;
- return addslashes( wp_kses(stripslashes( $data ), $allowedtags) );
+function wp_filter_kses( $data ) {
+ return addslashes( wp_kses( stripslashes( $data ), current_filter() ) );
}
/**
* Sanitize content with allowed HTML Kses rules.
*
* @since 2.9.0
- * @uses $allowedtags
*
* @param string $data Content to filter, expected to not be escaped
* @return string Filtered content
*/
-function wp_kses_data($data) {
- global $allowedtags;
- return wp_kses( $data , $allowedtags );
+function wp_kses_data( $data ) {
+ return wp_kses( $data, current_filter() );
}
/**
* data from forms.
*
* @since 2.0.0
- * @uses $allowedposttags
*
* @param string $data Post content to filter, expected to be escaped with slashes
* @return string Filtered post content with allowed HTML tags and attributes intact.
*/
-function wp_filter_post_kses($data) {
- global $allowedposttags;
- return addslashes ( wp_kses(stripslashes( $data ), $allowedposttags) );
+function wp_filter_post_kses( $data ) {
+ return addslashes( wp_kses( stripslashes( $data ), 'post' ) );
}
/**
* data from forms.
*
* @since 2.9.0
- * @uses $allowedposttags
*
* @param string $data Post content to filter
* @return string Filtered post content with allowed HTML tags and attributes intact.
*/
-function wp_kses_post($data) {
- global $allowedposttags;
- return wp_kses( $data , $allowedposttags );
+function wp_kses_post( $data ) {
+ return wp_kses( $data, 'post' );
+}
+
+/**
+ * Navigates through an array, object, or scalar, and sanitizes content for
+ * allowed HTML tags for post content.
+ *
+ * @since 4.4.2
+ *
+ * @see map_deep()
+ *
+ * @param mixed $data The array, object, or scalar value to inspect.
+ * @return mixed The filtered content.
+ */
+function wp_kses_post_deep( $data ) {
+ return map_deep( $data, 'wp_kses_post' );
}
/**
* @param string $data Content to strip all HTML from
* @return string Filtered content without any HTML
*/
-function wp_filter_nohtml_kses($data) {
- return addslashes ( wp_kses(stripslashes( $data ), array()) );
+function wp_filter_nohtml_kses( $data ) {
+ return addslashes( wp_kses( stripslashes( $data ), 'strip' ) );
}
/**
* 'excerpt_save_pre', and 'content_filtered_save_pre' hooks.
*
* @since 2.0.0
- * @uses add_filter() See description for what functions are added to what hooks.
*/
function kses_init_filters() {
- // Normal filtering.
- add_filter('pre_comment_content', 'wp_filter_kses');
+ // Normal filtering
add_filter('title_save_pre', 'wp_filter_kses');
+ // Comment filtering
+ if ( current_user_can( 'unfiltered_html' ) )
+ add_filter( 'pre_comment_content', 'wp_filter_post_kses' );
+ else
+ add_filter( 'pre_comment_content', 'wp_filter_kses' );
+
// Post filtering
add_filter('content_save_pre', 'wp_filter_post_kses');
add_filter('excerpt_save_pre', 'wp_filter_post_kses');
* @since 2.0.6
*/
function kses_remove_filters() {
- // Normal filtering.
- remove_filter('pre_comment_content', 'wp_filter_kses');
+ // Normal filtering
remove_filter('title_save_pre', 'wp_filter_kses');
+ // Comment filtering
+ remove_filter( 'pre_comment_content', 'wp_filter_post_kses' );
+ remove_filter( 'pre_comment_content', 'wp_filter_kses' );
+
// Post filtering
remove_filter('content_save_pre', 'wp_filter_post_kses');
remove_filter('excerpt_save_pre', 'wp_filter_post_kses');
* to have Kses filter the content. If the user does not have unfiltered_html
* capability, then Kses filters are added.
*
- * @uses kses_remove_filters() Removes the Kses filters
- * @uses kses_init_filters() Adds the Kses filters back if the user
- * does not have unfiltered HTML capability.
* @since 2.0.0
*/
function kses_init() {
kses_remove_filters();
- if (current_user_can('unfiltered_html') == false)
+ if ( ! current_user_can( 'unfiltered_html' ) ) {
kses_init_filters();
+ }
}
-add_action('init', 'kses_init');
-add_action('set_current_user', 'kses_init');
-
/**
* Inline CSS filter
*
* @since 2.8.1
+ *
+ * @param string $css A string of CSS rules.
+ * @param string $deprecated Not used.
+ * @return string Filtered string of CSS rules.
*/
function safecss_filter_attr( $css, $deprecated = '' ) {
if ( !empty( $deprecated ) )
$css = wp_kses_no_null($css);
$css = str_replace(array("\n","\r","\t"), '', $css);
- if ( preg_match( '%[\\(&=}]|/\*%', $css ) ) // remove any inline css containing \ ( & } = or comments
+ if ( preg_match( '%[\\\\(&=}]|/\*%', $css ) ) // remove any inline css containing \ ( & } = or comments
return '';
$css_array = explode( ';', trim( $css ) );
+
+ /**
+ * Filter list of allowed CSS attributes.
+ *
+ * @since 2.8.1
+ *
+ * @param array $attr List of allowed CSS attributes.
+ */
$allowed_attr = apply_filters( 'safe_style_css', array( 'text-align', 'margin', 'color', 'float',
'border', 'background', 'background-color', 'border-bottom', 'border-bottom-color',
'border-bottom-style', 'border-bottom-width', 'border-collapse', 'border-color', 'border-left',
'border-right-style', 'border-right-width', 'border-spacing', 'border-style', 'border-top',
'border-top-color', 'border-top-style', 'border-top-width', 'border-width', 'caption-side',
'clear', 'cursor', 'direction', 'font', 'font-family', 'font-size', 'font-style',
- 'font-variant', 'font-weight', 'height', 'letter-spacing', 'line-height', 'margin-bottom',
+ 'font-variant', 'font-weight', 'height', 'min-height','max-height' , 'letter-spacing', 'line-height', 'margin-bottom',
'margin-left', 'margin-right', 'margin-top', 'overflow', 'padding', 'padding-bottom',
'padding-left', 'padding-right', 'padding-top', 'text-decoration', 'text-indent', 'vertical-align',
- 'width' ) );
+ 'width', 'min-width', 'max-width' ) );
if ( empty($allowed_attr) )
return $css;
if ( strpos( $css_item, ':' ) === false ) {
$found = true;
} else {
- $parts = split( ':', $css_item );
+ $parts = explode( ':', $css_item );
if ( in_array( trim( $parts[0] ), $allowed_attr ) )
$found = true;
}
return $css;
}
+
+/**
+ * Helper function to add global attributes to a tag in the allowed html list.
+ *
+ * @since 3.5.0
+ * @access private
+ *
+ * @param array $value An array of attributes.
+ * @return array The array of attributes with global attributes added.
+ */
+function _wp_add_global_attributes( $value ) {
+ $global_attributes = array(
+ 'class' => true,
+ 'id' => true,
+ 'style' => true,
+ 'title' => true,
+ 'role' => true,
+ );
+
+ if ( true === $value )
+ $value = array();
+
+ if ( is_array( $value ) )
+ return array_merge( $value, $global_attributes );
+
+ return $value;
+}
scripts.mit.edu / autoinstalls / wordpress.git / blobdiff