PHP文件 Zip 压缩

[php]代码库

/*  PHP文件 Zip 压缩 */ 
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);