+
+/**
+ * Check or set whether WordPress is in "installation" mode.
+ *
+ * If the `WP_INSTALLING` constant is defined during the bootstrap, `wp_installing()` will default to `true`.
+ *
+ * @since 4.4.0
+ *
+ * @staticvar bool $installing
+ *
+ * @param bool $is_installing Optional. True to set WP into Installing mode, false to turn Installing mode off.
+ * Omit this parameter if you only want to fetch the current status.
+ * @return bool True if WP is installing, otherwise false. When a `$is_installing` is passed, the function will
+ * report whether WP was in installing mode prior to the change to `$is_installing`.
+ */
+function wp_installing( $is_installing = null ) {
+ static $installing = null;
+
+ // Support for the `WP_INSTALLING` constant, defined before WP is loaded.
+ if ( is_null( $installing ) ) {
+ $installing = defined( 'WP_INSTALLING' ) && WP_INSTALLING;
+ }
+
+ if ( ! is_null( $is_installing ) ) {
+ $old_installing = $installing;
+ $installing = $is_installing;
+ return (bool) $old_installing;
+ }
+
+ return (bool) $installing;
+}
+
+/**
+ * Determines if SSL is used.
+ *
+ * @since 2.6.0
+ * @since 4.6.0 Moved from functions.php to load.php.
+ *
+ * @return bool True if SSL, otherwise false.
+ */
+function is_ssl() {
+ if ( isset( $_SERVER['HTTPS'] ) ) {
+ if ( 'on' == strtolower( $_SERVER['HTTPS'] ) ) {
+ return true;
+ }
+
+ if ( '1' == $_SERVER['HTTPS'] ) {
+ return true;
+ }
+ } elseif ( isset($_SERVER['SERVER_PORT'] ) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
+ return true;
+ }
+ return false;
+}
+
+/**
+ * Converts a shorthand byte value to an integer byte value.
+ *
+ * @since 2.3.0
+ * @since 4.6.0 Moved from media.php to load.php.
+ *
+ * @link http://php.net/manual/en/function.ini-get.php
+ * @link http://php.net/manual/en/faq.using.php#faq.using.shorthandbytes
+ *
+ * @param string $value A (PHP ini) byte value, either shorthand or ordinary.
+ * @return int An integer byte value.
+ */
+function wp_convert_hr_to_bytes( $value ) {
+ $value = strtolower( trim( $value ) );
+ $bytes = (int) $value;
+
+ if ( false !== strpos( $value, 'g' ) ) {
+ $bytes *= GB_IN_BYTES;
+ } elseif ( false !== strpos( $value, 'm' ) ) {
+ $bytes *= MB_IN_BYTES;
+ } elseif ( false !== strpos( $value, 'k' ) ) {
+ $bytes *= KB_IN_BYTES;
+ }
+
+ // Deal with large (float) values which run into the maximum integer size.
+ return min( $bytes, PHP_INT_MAX );
+}
+
+/**
+ * Determines whether a PHP ini value is changeable at runtime.
+ *
+ * @since 4.6.0
+ *
+ * @link http://php.net/manual/en/function.ini-get-all.php
+ *
+ * @param string $setting The name of the ini setting to check.
+ * @return bool True if the value is changeable at runtime. False otherwise.
+ */
+function wp_is_ini_value_changeable( $setting ) {
+ static $ini_all;
+
+ if ( ! isset( $ini_all ) ) {
+ $ini_all = false;
+ // Sometimes `ini_get_all()` is disabled via the `disable_functions` option for "security purposes".
+ if ( function_exists( 'ini_get_all' ) ) {
+ $ini_all = ini_get_all();
+ }
+ }
+
+ // Bit operator to workaround https://bugs.php.net/bug.php?id=44936 which changes access level to 63 in PHP 5.2.6 - 5.2.17.
+ if ( isset( $ini_all[ $setting ]['access'] ) && ( INI_ALL === ( $ini_all[ $setting ]['access'] & 7 ) || INI_USER === ( $ini_all[ $setting ]['access'] & 7 ) ) ) {
+ return true;
+ }
+
+ // If we were unable to retrieve the details, fail gracefully to assume it's changeable.
+ if ( ! is_array( $ini_all ) ) {
+ return true;
+ }
+
+ return false;
+}