PHP file zip compression and zip decompression

/* Creates a compressed zip file */
function create_zip ($files = Array (), $destination = ', $overwrite = False) {
//if the zip file already exists and overwrite is false, return false
if (file_exists ($destination) &&! $overwrite) {return false;}
//vars
$valid _files = Array ();
//if files were passed in ...
if (Is_array ($files)) {
//cycle through each file
foreach ($files as $file) {
//make sure the file exists if (file_exists ($file)) {
$valid _files[] = $file;
}
}

//if we have good files ...
if (count ($valid _files)) {
//create the archive
$zip = new ziparchive ();
if ($zip->open ($destination, $ Overwrite? Ziparchive::overwrite:ziparchive::create)!== true) {
return false;
}
//add The Files
foreach ($valid _files as $file) {
$zip->addfile ($file, $file);
}
//debug
//echo ' The zip archive contains ', $zip->numfiles, ' files with a status of ', $zip->status;

Close the zip--done!
$zip->close ();

Check to make sure the file exists
return file_exists ($destination);
}
Else
{
return false;
}
}
/***** Example Usage ***/
$files =array (' file1.jpg ', ' file2.jpg ', ' file3.gif ');
Create_zip ($files, ' Myzipfile.zip ', true);

PHP uncompressed Zip file

/**********************
* @file-path to zip file
* @destination-destination directory for unzipped files
*/
function Unzip_file ($file, $destination) {
Create Object
$zip = new Ziparchive ();
Open Archive
if ($zip->open ($file)!== TRUE) {
Die (' could not open archive ');
}
Extract contents to destination directory
$zip->extractto ($destination);
Close Archive
$zip->close ();
Echo ' Archive extracted to directory ';
}