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Faster is_serialized(). Props duck_, hakre, Denis-de-Bernardy. see #14429 

git-svn-id: http://svn.automattic.com/wordpress/trunk@16300 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
ryan 2010-11-11 16:10:16 +00:00
parent 0a1fa29fe2
commit 6ea5924298
1 changed files with 15 additions and 18 deletions
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33
wp-includes/functions.php
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@ -246,34 +246,31 @@ function maybe_unserialize( $original ) {
*/ */
function is_serialized( $data ) { function is_serialized( $data ) {
// if it isn't a string, it isn't serialized // if it isn't a string, it isn't serialized
if ( !is_string( $data ) ) if ( ! is_string( $data ) )
return false; return false;
$data = trim( $data ); $data = trim( $data );
if ( 'N;' == $data ) if ( 'N;' == $data )
return true; return true;
if ( function_exists('strpbrk') ) { $length = strlen( $data );
if ( strlen($data) > 1 && strpbrk($data,'adObis') == $data && $data[1] == ':' ) { if ( $length < 4 )
$badions = array();
$badions[1] = $data[0];
} else {
return false;
}
} elseif ( !preg_match( '/^([adObis]):/', $data, $badions ) ) {
return false; return false;
} if ( ':' !== $data[1] )
switch ( $badions[1] ) { return false;
$lastc = $data[$length-1];
if ( ';' !== $lastc && '}' !== $lastc )
return false;
$token = $data[0];
switch ( $token ) {
case 's' :
if ( '"' !== $data[$length-2] )
return false;
case 'a' : case 'a' :
case 'O' : case 'O' :
case 's' : return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );
if ( preg_match( "/^{$badions[1]}:[0-9]+:.*[;}]\$/s", $data ) )
return true;
break;
case 'b' : case 'b' :
case 'i' : case 'i' :
case 'd' : case 'd' :
if ( preg_match( "/^{$badions[1]}:[0-9.E-]+;\$/", $data ) ) return (bool) preg_match( "/^{$token}:[0-9.E-]+;\$/", $data );
return true;
break;
} }
return false; return false;
} }