Is Serialized 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;
}

Source: developer.wordpress.org

Similar codes

6 votes257 views2 answers
How to set tinyint default 0 laravel migration
PHP
2 votes241 views1 answer
Multiple logical condition in laravel query
PHP
0 vote247 views1 answer
Contact form dropdown from post
PHP
0 vote242 views1 answer
Wpmu assign user to blog
PHP
0 vote297 views1 answer
Create char laravel migration
PHP Laravel
0 vote230 views1 answer
Array_key_first not works
PHP
0 vote263 views1 answer
Increas file upload db
PHP
0 vote259 views1 answer
Php csv to multirow array $_FILES
PHP
11 votes239 views6 answers
Laravel route
PHP
5 votes258 views2 answers
Laravel jetstream livewire
PHP