php文件zip压缩、解压

zip压缩
function create_zip($files = array(),$destination = ‘’,$overwrite = false) {
if(file_exists($destination) && !$overwrite) {
return false;
}
if(is_array($files)) {
foreach($files as $file) {
if(file_exists($file)) {
$valid_files[] = $file;
}
}
}
if(count($valid_files)) {
archive $zip = new ZipArchive();
if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) {
return false;
}
foreach($valid_files as $file) {
$zip->addFile($file,$file);
}
$zip->close();
file_exists($destination);
} else {
return false;
}
}

解压zip文件
function unzip_file($file, $destination){
$zip = new ZipArchive() ;
if ($zip->open($file) !== TRUE) {
die (’Could not open archive’);
}
$zip->extractTo($destination);
$zip->close();
echo ‘Archive extracted to directory’;

}