wordpress-database-modifier-when-migrating

<?php
// LIVE DEMO (with README + ALTERNATIVES):  http://www.protectpages.com/software/WordpressMigrator.php

if (empty($_FILES['dbfilee'])) { ?>
	<form action="" method="POST" enctype="multipart/form-data"><h1>Intelligenty replaces words or domains with new values</h1><br/><br/>
	Old string <input type="text" value="" placeholder="i.e. word1 or http://domain1.com" name="oldstr" style="width:300px;" /><br/>
	new string<input type="text" value="" placeholder="i.e. word2 or http://domain2.com" style="width:300px;" name="newstr" /><br/>
	drag database file here:<input type="file" name="dbfilee" /><br/><input type="submit" value="GENERATE NEW DB" /> (and wait some time...)
	</form>
	<?php
}

else { 
	function DOMAIN_or_STRING_modifier_in_DB($old_string,  $new_string, $sql_content,     $download = false){
		set_time_limit(1000);
		if(empty($old_string) || empty($new_string) || empty($sql_content)) return;
		$length_difference= strlen($old_string)- strlen($new_string);			//i.e. FROM  site.com TO example.com
		$old_string_slashed=str_replace('/','\/',$old_string);
		// Replace every occurence of Serialized arrays, i.e. {s:32:"blablabla"}
		preg_match_all('/(|\}|\{|\;\|)s\:(\d{1,5})\:\"(.*?)\";/si', $sql_content, $n1, PREG_SET_ORDER);
		preg_match_all('/(|\}|\{|\;\|)s\:(\d{1,5})\:\\\"(.*?)\";/si', $sql_content, $n2, PREG_SET_ORDER);  $n=array_merge($n1,$n2);

		foreach($n as $Each_Serialized_String){ $e=$Each_Serialized_String;	//var_dump($e); 0=>{s:12:"blablablabla"   1=>;     2=>17    3=>"blablablabla"
			if(stripos($e[3],$old_string)!==false){ //if string  found in line, then go to next
			if(!is_numeric($e[2])) { continue; }  else { $found_char_length= intval($e[2]);}  
			$before_s = $e[1]; //i.e.   } or { or ; or | 
			$found_line	= $e[0];	  
			$found_line_changed	= str_replace(
				array($before_s.'s:'.$found_char_length,							$old_string),
				array($before_s.'s:'.($found_char_length - $length_difference),	$new_string),
				$found_line); 
			$sql_content	= str_replace($found_line,	    str_replace($old_string,$new_string,$found_line_changed),    $sql_content);
		  }
		}
		// Now, we can freely replace  typical occurences
		$sql_content=str_replace($old_string,$new_string,$sql_content);
		if ($download) { header('Content-Type: application/octet-stream');	header("Content-Transfer-Encoding: Binary"); header('Content-disposition: attachment; filename="db_'.rand(1,99999).'.sql"');  echo $sql_content; exit; }   else {return $sql_content;}
	}	
	// EXECUTE !!!
	DOMAIN_or_STRING_modifier_in_DB($_POST['oldstr'], $_POST['newstr'],     file_get_contents($_FILES["dbfilee"]["tmp_name"]),    true);

}
?>