PHP Command line zip utility. Simply zips a directory structure into an archive. No bells or whistles.

phpzip.php

<?php
/*
 * Command line zip equivalent - very simple version that just zips a directory structure completely.
 * No options!
 * Useful when it is needed to build e.g. a Wordpress plugin zip archive, but the dev environment
 * doesn't have zip - i.e. MINGW64 as bundled with Git - has unzip, but not zip.
 */

date_default_timezone_set('UTC');
error_reporting (E_ALL);

if ($argc < 3){
    echo "Usage: php phpzip archive_name directory_to_zip\n";
    exit(1);
}

if(!extension_loaded('zip')){
    echo "Error: PHP Zip extension not loaded, cannot continue.\n";
    exit(1);  
}

//function to recursively add files and folders to zip
function folder_to_zip($folder, &$zip_obj) {
    if (is_null($zip_obj)) {
        throw new Exception("Error: No Zip class object provided.");
    }
    // ensure slash termination
    $folder = rtrim($folder, '/') . '/';
    
    // iterate through files and directories
    $handle = @opendir($folder);
    if($handle === false){
        throw new Exception("Error: Cannot open '$folder'.");
    }
    
    while ($f = readdir($handle)) {
        if ($f != "." && $f != "..") {
            if (is_file($folder . $f)) {
                $res = @$zip_obj->addFile($folder . $f);
                if($res === false){
                    throw new Exception("Error: Failed to write file to archive.");
                }
            } elseif (is_dir($folder . $f)) {
                // if dir, create a new dir in the zip
                $res = @$zip_obj->addEmptyDir($folder . $f);
                if($res === false){
                    throw new Exception("Error: Failed to create directory in archive.");
                }
                // ...and call the function again recursively
                folder_to_zip($folder . $f, $zip_obj);
            }
        }
    }
    closedir($handle);
}

$z = new ZipArchive();
$res = @$z->open($argv[1], ZIPARCHIVE::OVERWRITE);
if($res === false){
    echo("Error: Failed to open zip archive to write.\n");
    exit(1);
}

try{
    folder_to_zip($argv[2], $z);
    $z->close();
}catch(Exception $ex){
    echo $ex->getMessage()."\n";
    $z->close();
    exit(1);
}

//all good
exit(0);

/* end */