PHP reverse var_dump function

unvar_dump.php

<?php
/*
 * thanks to 
 * - https://stackoverflow.com/questions/3531857/convert-var-dump-of-array-back-to-array-variable
 * - https://stackoverflow.com/questions/2853454/php-unserialize-fails-with-non-encoded-characters
 */
function unvar_dump($str) {
    if (strpos($str, "\n") === false) {
        //Add new lines:
        $regex = array(
            '#(\\[.*?\\]=>)#',
            '#(string\\(|int\\(|float\\(|array\\(|NULL|object\\(|})#',
        );
        $str = preg_replace($regex, "\n\\1", $str);
        $str = trim($str);
    }
    $regex = array(
        '#^\\040*NULL\\040*$#m',
        '#^\\s*array\\((.*?)\\)\\s*{\\s*$#m',
        '#^\\s*string\\((.*?)\\)\\s*(.*?)$#m',
        '#^\\s*int\\((.*?)\\)\\s*$#m',
        '#^\\s*bool\\(true\\)\\s*$#m',
        '#^\\s*bool\\(false\\)\\s*$#m',
        '#^\\s*float\\((.*?)\\)\\s*$#m',
        '#^\\s*\[(\\d+)\\]\\s*=>\\s*$#m',
        '#\\s*?\\r?\\n\\s*#m',
    );
    $replace = array(
        'N',
        'a:\\1:{',
        's:\\1:\\2',
        'i:\\1',
        'b:1',
        'b:0',
        'd:\\1',
        'i:\\1',
        ';'
    );
    $serialized = preg_replace($regex, $replace, $str);
    $func = create_function(
        '$match',
        'return "s:".strlen($match[1]).":\\"".$match[1]."\\"";'
        );
    $serialized = preg_replace_callback(
        '#\\s*\\["(.*?)"\\]\\s*=>#',
        $func,
        $serialized
        );
    $func = create_function(
        '$match',
        'return "O:".strlen($match[1]).":\\"".$match[1]."\\":".$match[2].":{";'
        );
    $serialized = preg_replace_callback(
        '#object\\((.*?)\\).*?\\((\\d+)\\)\\s*{\\s*;#',
        $func,
        $serialized
        );
    $serialized = preg_replace(
        array('#};#', '#{;#'),
        array('}', '{'),
        $serialized
    );
    $serialized = preg_replace_callback('!s:(\d+):"(.*?)";!s', function ($matches) {
        return 's:'.strlen($matches[2]).':"'.$matches[2].'";';
    }, $serialized);
    return unserialize($serialized);
}