Convert snake case methods, properties and variables to camel case

convertCase.php

<?php
function snakeToCamel($val) {  
    preg_match('#^_*#', $val, $underscores);
    $underscores = current($underscores);
    $camel = str_replace(' ', '', ucwords(str_replace('_', ' ', $val)));  
    $camel = strtolower(substr($camel, 0, 1)).substr($camel, 1);

    return $underscores.$camel;  
}  

function convert($str) {
    $name = '[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*';
    $snake_regexps = array(
        "#->($name)#i",
        '#\$('.$name.')#i',
        "#function ($name)#i",
    );
    foreach($snake_regexps as $regexp)
        $str = preg_replace_callback($regexp, function($matches) {
            //print_r($matches);
            $camel = snakeToCamel($matches[1]);
            return str_replace($matches[1],$camel,$matches[0]);
        },$str);
    return $str;

}

$path = $argv[1];
$Iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path));
foreach($Iterator as $file){
    if(substr($file,-4) !== '.php')
        continue;
    echo($file);
    $out = convert(file_get_contents($file));
    file_put_contents($file, $out);
}

copy from https://phpixie.com/blog/convert-snake-case-methods-properties-and-variables-to-camel-case.html

usage:

php convertCase.php /projects/project1/