is_serialized( string $data, bool $strict = true )
Check value to find if it was serialized.
Description Description
If $data is not an string, then returned value will always be false. Serialized data is always a string.
Parameters Parameters
- $data
-
(string) (Required) Value to check to see if was serialized.
- $strict
-
(bool) (Optional) Whether to be strict about the end of the string.
Default value: true
Return Return
(bool) False if not serialized and true if it was.
Source Source
File: wp-includes/functions.php
function is_serialized( $data, $strict = true ) { // if it isn't a string, it isn't serialized. if ( ! is_string( $data ) ) { return false; } $data = trim( $data ); if ( 'N;' == $data ) { return true; } if ( strlen( $data ) < 4 ) { return false; } if ( ':' !== $data[1] ) { return false; } if ( $strict ) { $lastc = substr( $data, -1 ); if ( ';' !== $lastc && '}' !== $lastc ) { return false; } } else { $semicolon = strpos( $data, ';' ); $brace = strpos( $data, '}' ); // Either ; or } must exist. if ( false === $semicolon && false === $brace ) { return false; } // But neither must be in the first X characters. if ( false !== $semicolon && $semicolon < 3 ) { return false; } if ( false !== $brace && $brace < 4 ) { return false; } } $token = $data[0]; switch ( $token ) { case 's': if ( $strict ) { if ( '"' !== substr( $data, -2, 1 ) ) { return false; } } elseif ( false === strpos( $data, '"' ) ) { return false; } // or else fall through case 'a': case 'O': return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data ); case 'b': case 'i': case 'd': $end = $strict ? '$' : ''; return (bool) preg_match( "/^{$token}:[0-9.E-]+;$end/", $data ); } return false; }
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Changelog Changelog
Version | Description |
---|---|
2.0.5 | Introduced. |