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<?php |
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/** |
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* Friends: SimplePie_Misc class |
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* |
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* @package Friends |
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* @since 1.0 |
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*/ |
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|
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namespace Friends; |
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|
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/** |
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* Overrides SimplePie_Misc functions as necessary. |
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* |
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* @see SimplePie_Misc |
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*/ |
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class SimplePie_Misc extends \SimplePie_Misc { |
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/** |
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* Change a string from one encoding to another |
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* |
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* @param string $data Raw data in $input encoding. |
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* @param string $input Encoding of $data. |
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* @param string $output Encoding you want. |
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* @return string|boolean False if we can't convert it. |
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*/ |
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public static function change_encoding( $data, $input, $output ) { |
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if ( 'UTF-8' === $input && 'UTF-8' === $output ) { |
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$clean_utf8_regex = <<<'END' |
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! # Thanks, https://stackoverflow.com/a/1401716/578588 |
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( # modified to clean for valid XML ASCII, see https://www.w3.org/TR/REC-xml/#NT-Char |
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(?: [\x9\xD] # valid XML single-bytes |
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| [\x20-\x7F] # single-byte sequences 0xxxxxxx |
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| [\xC0-\xDF][\x80-\xBF] # double-byte sequences 110xxxxx 10xxxxxx |
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| [\xE0-\xEF][\x80-\xBF]{2} # triple-byte sequences 1110xxxx 10xxxxxx * 2 |
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| [\xF0-\xF7][\x80-\xBF]{3} # quadruple-byte sequence 11110xxx 10xxxxxx * 3 |
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){1,100} # ...one or more times |
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) |
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| ( [\x80-\xBF] ) # invalid byte in range 10000000 - 10111111 |
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| ( [\xC0-\xFF] ) # invalid byte in range 11000000 - 11111111 |
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| (.) |
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!x |
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END; |
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$data = preg_replace_callback( |
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$clean_utf8_regex, |
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function ( $captures ) { |
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if ( $captures[1] ) { |
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// Valid byte sequence. Return unmodified. |
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return $captures[1]; |
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} elseif ( $captures[2] ) { |
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// Invalid byte of the form 10xxxxxx. |
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// Encode as 11000010 10xxxxxx. |
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return "\xC2" . $captures[2]; |
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} elseif ( $captures[3] ) { |
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// Invalid byte of the form 11xxxxxx. |
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// Encode as 11000011 10xxxxxx. |
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return "\xC3" . chr( ord( $captures[3] ) - 64 ); |
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} else { |
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// Single-byte characters invalid for XML. Ignore. |
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} |
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}, |
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$data |
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); |
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} |
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return parent::change_encoding( $data, $input, $output ); |
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} |
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|
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public static function error( $message, $level, $file, $line ) { |
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if ( apply_filters( 'friends_debug', false ) ) { |
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return parent::error( $message, $level, $file, $line ); |
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} |
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} |
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} |
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|
