use.php

<?php

require __DIR__."/zip/Zip.php";

$zip = new Zip();
var_dump($zip->zipar("test", "test/test.zip", "archive"));
var_dump($zip->zipar("test-1", "test-1/test1.zip", "test"));
var_dump($zip->zipar("test-2", "test-2/test2.zip", "test-1"));
var_dump($zip->zipar("test-3", "test-3/test3.zip", "test-2"));

zip.php

<?php  

class Zip
{
	private $pathFile;
	private $fileZip;
	private $dirCurrent;
	
	public function zipar($pathFile, $fileZip, $dirCurrent)
	{
		$this->dirCurrent = $dirCurrent;
		$this->pathFile = $pathFile;
		$this->fileZip = $fileZip;
	    $zip = new ZipArchive();
		chdir($this->dirCurrent);
		$zip->open($this->fileZip, ZipArchive::CREATE | ZipArchive::OVERWRITE);
	    $files = new RecursiveIteratorIterator(
    											new RecursiveDirectoryIterator($pathFile),
    											RecursiveIteratorIterator::LEAVES_ONLY
											);

	    foreach ($files as $file)
        {
        	if(!$file->isDir())
            	$zip->addFile($file);
        }
        $zip->close();
	}
}