WordPress 4.2

[autoinstalls/wordpress.git] / wp-includes / compat.php

diff --git a/wp-includes/compat.php b/wp-includes/compat.php
index e84ba3c97d9d6cc9dbaca4a8c5badc06f50a85af..43667053f163917d06c89467f71ec61e9d471246 100644 (file)
--- a/wp-includes/compat.php
+++ b/wp-includes/compat.php
@@ -13,25 +13,43 @@ if ( !function_exists('_') ) {
        }
 }
 
-if ( !function_exists('mb_substr') ):
-       function mb_substr( $str, $start, $length=null, $encoding=null ) {
-               return _mb_substr($str, $start, $length, $encoding);
+if ( ! function_exists( 'mb_substr' ) ) :
+       function mb_substr( $str, $start, $length = null, $encoding = null ) {
+               return _mb_substr( $str, $start, $length, $encoding );
        }
 endif;
 
-function _mb_substr( $str, $start, $length=null, $encoding=null ) {
-       // the solution below, works only for utf-8, so in case of a different
-       // charset, just use built-in substr
+function _mb_substr( $str, $start, $length = null, $encoding = null ) {
+       // The solution below works only for UTF-8,
+       // so in case of a different charset just use built-in substr()
        $charset = get_option( 'blog_charset' );
-       if ( !in_array( $charset, array('utf8', 'utf-8', 'UTF8', 'UTF-8') ) ) {
-               return is_null( $length )? substr( $str, $start ) : substr( $str, $start, $length);
+       if ( ! in_array( $charset, array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ) ) {
+               return is_null( $length ) ? substr( $str, $start ) : substr( $str, $start, $length );
        }
-       // use the regex unicode support to separate the UTF-8 characters into an array
+       // Use the regex unicode support to separate the UTF-8 characters into an array
        preg_match_all( '/./us', $str, $match );
-       $chars = is_null( $length )? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
+       $chars = is_null( $length ) ? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
        return implode( '', $chars );
 }
 
+if ( ! function_exists( 'mb_strlen' ) ) :
+       function mb_strlen( $str, $encoding = null ) {
+               return _mb_strlen( $str, $encoding );
+       }
+endif;
+
+function _mb_strlen( $str, $encoding = null ) {
+       // The solution below works only for UTF-8,
+       // so in case of a different charset just use built-in strlen()
+       $charset = get_option( 'blog_charset' );
+       if ( ! in_array( $charset, array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ) ) {
+               return strlen( $str );
+       }
+       // Use the regex unicode support to separate the UTF-8 characters into an array
+       preg_match_all( '/./us', $str, $match );
+       return count( $match[0] );
+}
+
 if ( !function_exists('hash_hmac') ):
 function hash_hmac($algo, $data, $key, $raw_output = false) {
        return _hash_hmac($algo, $data, $key, $raw_output);
@@ -60,3 +78,72 @@ function _hash_hmac($algo, $data, $key, $raw_output = false) {
                return pack( $pack, $hmac );
        return $hmac;
 }
+
+if ( !function_exists('json_encode') ) {
+       function json_encode( $string ) {
+               global $wp_json;
+
+               if ( ! ( $wp_json instanceof Services_JSON ) ) {
+                       require_once( ABSPATH . WPINC . '/class-json.php' );
+                       $wp_json = new Services_JSON();
+               }
+
+               return $wp_json->encodeUnsafe( $string );
+       }
+}
+
+if ( !function_exists('json_decode') ) {
+       function json_decode( $string, $assoc_array = false ) {
+               global $wp_json;
+
+               if ( ! ($wp_json instanceof Services_JSON ) ) {
+                       require_once( ABSPATH . WPINC . '/class-json.php' );
+                       $wp_json = new Services_JSON();
+               }
+
+               $res = $wp_json->decode( $string );
+               if ( $assoc_array )
+                       $res = _json_decode_object_helper( $res );
+               return $res;
+       }
+       function _json_decode_object_helper($data) {
+               if ( is_object($data) )
+                       $data = get_object_vars($data);
+               return is_array($data) ? array_map(__FUNCTION__, $data) : $data;
+       }
+}
+
+if ( ! function_exists( 'hash_equals' ) ) :
+/**
+ * Compare two strings in constant time.
+ *
+ * This function was added in PHP 5.6.
+ * It can leak the length of a string.
+ *
+ * @since 3.9.2
+ *
+ * @param string $a Expected string.
+ * @param string $b Actual string.
+ * @return bool Whether strings are equal.
+ */
+function hash_equals( $a, $b ) {
+       $a_length = strlen( $a );
+       if ( $a_length !== strlen( $b ) ) {
+               return false;
+       }
+       $result = 0;
+
+       // Do not attempt to "optimize" this.
+       for ( $i = 0; $i < $a_length; $i++ ) {
+               $result |= ord( $a[ $i ] ) ^ ord( $b[ $i ] );
+       }
+
+       return $result === 0;
+}
+endif;
+
+// JSON_PRETTY_PRINT was introduced in PHP 5.4
+// Defined here to prevent a notice when using it with wp_json_encode()
+if ( ! defined( 'JSON_PRETTY_PRINT' ) ) {
+       define( 'JSON_PRETTY_PRINT', 128 );
+}