<?php
$zend_location = '/usr/share/php/Zend';
$gilbert_location = '/home/steve/repos/test';
 
$dir_iterator = new RecursiveDirectoryIterator($zend_location);
$iterator = new RecursiveIteratorIterator($dir_iterator, RecursiveIteratorIterator::SELF_FIRST);
 
// include all files recursively
foreach ($iterator as $file) {
    echo str_ireplace($zend_location, '', $file->getPath(), 1);