Wordpress database serialize problem fixers

wordpress_serialize_fixer.php

<?php

$file = @$_GET["file"];
if(empty($file)) 
  die("You must specify a ?file value.");

function fixSerialized($error_serialized_data) 
{
	$fixed_serialized_data = preg_replace_callback ( '!s:(\d+):"(.*?)";!',
	    function($match) {
	        return ($match[1] == strlen($match[2])) ? $match[0] : 's:' . strlen($match[2]) . ':"' . $match[2] . '";';
	    },
	$error_serialized_data );

	return $fixed_serialized_data;
}

header("Content-type: application/octet-stream");
header('Content-Disposition: attachment; filename=wordpress_db.sql');

$subject = file_get_contents($file);

$separator = "\r\n";
$line = strtok($subject, $separator);
$fixed = 0;

while ($line !== false) 
{
    # do something with $line
	$matches = array();
	if(preg_match("/'a:\d+.+?\}'/", $line, $matches)) 
	{
		foreach ($matches as $match) 
		{
			$l = substr($match, 1, -1);
			$ll = fixSerialized($l);
			if($l !== $ll) ++$fixed;
			$line = str_replace($l, $ll, $line);
		}
	}

	echo $line."\n";

    $line = strtok( $separator );
}

echo "-- Total fixed lines: {$fixed}";