Rename File Extention Only in Root All Sub Directories

renameFilesExtensions-AllPaths.php

<?php
// root path
$path = realpath('.');

// finds everything in $path including root directory
$objects = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path), RecursiveIteratorIterator::SELF_FIRST);

// each objects as $file if echo $file files will be printed
foreach($objects as $file => $object){
    // if the extension is '.jpg'
    if (strtolower(pathinfo($file, PATHINFO_EXTENSION)) == 'php')
    {
        // do the rename based on the current iteration
        $fileName = explode(".", $file);

        $newName = $fileName[0] . '.html';
        rename($file, $newName);
    }
}