PHP 片段即時壓縮 zip 文件

使用下面的 PHP 片段可以即時壓縮 zip 文件

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;  
}  

}</pre> 

 用法：
<?php
$files=array('file1.jpg', 'file2.jpg', 'file3.gif');  
create_zip($files, 'myzipfile.zip', true); 
?>