PHP Class: Unzip files

<?php
/**************************************
 seesaw associates | http://seesaw.net
 
 client: 
 file: 
 description: 
 
 Copyright (C) 2008 Matt Kenefick(.com)
**************************************/
 
class zipArch {
		/**
		 * Unzip the source_file in the destination dir
		 *
		 * @param   string      The path to the ZIP-file.
		 * @param   string      The path where the zipfile should be unpacked, if false the directory of the zip-file is used
		 * @param   boolean     Indicates if the files will be unpacked in a directory with the name of the zip-file (true) or not (false) (only if the destination directory is set to false!)
		 * @param   boolean     Overwrite existing files (true) or not (false)
		 * 
		 * @return  boolean     Succesful or not
		 */
		function unzip($src_file, $dest_dir=false, $create_zip_name_dir=true, $overwrite=true)
		{
		  if(function_exists("zip_open"))
		  {   
		      if(!is_resource(zip_open($src_file)))
		      { 
		          $src_file=dirname($_SERVER['SCRIPT_FILENAME'])."/".$src_file; 
		      }
 
		      if (is_resource($zip = zip_open($src_file)))
		      {          
		          $splitter = ($create_zip_name_dir === true) ? "." : "/";
		          if ($dest_dir === false) $dest_dir = substr($src_file, 0, strrpos($src_file, $splitter))."/";
 
		          // Create the directories to the destination dir if they don't already exist
		          $this->create_dirs($dest_dir);
 
		          // For every file in the zip-packet
		          while ($zip_entry = zip_read($zip))
		          {
		            // Now we're going to create the directories in the destination directories
 
		            // If the file is not in the root dir
		            $pos_last_slash = strrpos(zip_entry_name($zip_entry), "/");
		            if ($pos_last_slash !== false)
		            {
		              // Create the directory where the zip-entry should be saved (with a "/" at the end)
		              $this->create_dirs($dest_dir.substr(zip_entry_name($zip_entry), 0, $pos_last_slash+1));
		            }
 
		            // Open the entry
		            if (zip_entry_open($zip,$zip_entry,"r"))
		            {
 
		              // The name of the file to save on the disk
		              $file_name = $dest_dir.zip_entry_name($zip_entry);
 
		              // Check if the files should be overwritten or not
		              if ($overwrite === true || $overwrite === false && !is_file($file_name))
		              {
		                // Get the content of the zip entry
		                $fstream = zip_entry_read($zip_entry, zip_entry_filesize($zip_entry));           
 
		                if(!is_dir($file_name))            
		                file_put_contents($file_name, $fstream );
		                // Set the rights
		                if(file_exists($file_name))
		                {
		                    chmod($file_name, 0777);
		                    echo "<span style=\"color:#1da319;\">file saved: </span>".$file_name."<br />";
		                }
		                else
		                {
		                    echo "<span style=\"color:red;\">file not found: </span>".$file_name."<br />";
		                }
		              }
 
		              // Close the entry
		              zip_entry_close($zip_entry);
		            }      
		          }
		          // Close the zip-file
		          zip_close($zip);
		      }
		      else
		      {
		        echo "No Zip Archive Found.";
		        return false;
		      }
 
		      return true;
		  }
		  else
		  {
		      if(version_compare(phpversion(), "5.2.0", "<"))
		      $infoVersion="(use PHP 5.2.0 or later)";
 
		      echo "You need to install/enable the php_zip.dll extension $infoVersion"; 
		  }
		}
 
		function create_dirs($path)
		{
		  if (!is_dir($path))
		  {
		    $directory_path = "";
		    $directories = explode("/",$path);
		    array_pop($directories);
 
		    foreach($directories as $directory)
		    {
		      $directory_path .= $directory."/";
		      if (!is_dir($directory_path))
		      {
		        mkdir($directory_path);
		        chmod($directory_path, 0777);
		      }
		    }
		  }
		}
 
}
?>