need help in updating function to modern php code preg replace

[rajveer]

can someone please fix this error in function from gumslone gumchat v3 script

function is

function mb_unserialize($serial_str) {
    $out = preg_replace('!s:(\d+):"(.*?)";!se', "'s:'.strlen('$2').':"$2";'", $serial_str);
    return unserialize($out);
} 

and error is

PHP Warning:  preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead 

it is used for user database settings where smileys and color is inserted in serialized kinda way then unserialized using this function above to use in script for
turning smileys on off and selecting username colors aswell as ignore list

[something else]

Your above code is incorrect due to coding-talks [ php] bbcode - try using [ code] bbcode instead.

[rajveer]

function mb_unserialize($serial_str) {
    $out = preg_replace('!s:(\d+):"(.*?)";!se', "'s:'.strlen('$2').':\"$2\";'", $serial_str);
    return unserialize($out);
}

[something else]

function mb_unserialize($serial_str) {
    $out = preg_replace_callback('!s:(\d+):"(.*?)";!s', 
    function($m) 
    {
            return 's:' . strlen($m[2]) . ':\"' . $m[2] . '\";';
    },
    $serial_str);
    return unserialize($out);
}

[rajveer]

thanks something else