rgen3

<?php

$string = 'thisIsCamelAAACase';

$result = preg_replace_callback(
    '/(?P<some>[A-Z]+)(?P<name>[A-Z])|(?<![A-Z])(?P<name>[A-Z])/J', 
    function($m) { return strtolower("_" . (empty($m['some']) ? '' : $m['some'] . '_') . $m['name']); }, 
    $string
);

rgen3

<?php

class a
{
    public function exportClick()
    {
        echo $i = 0, PHP_EOL;
        $params = [];
        $items  = [];

rgen3

<?php

$levels = [
	['word'],
	['concat', 'two'],
	['others', 'the others']
];

function concat(array $array, $concat = '', $result = []) {
    $current = array_shift($array);

rgen3

domain=$1
iteration=1
if [ $domain = '']
  then
    domain=your_default_domain_here
  fi

while true;
do
sleep 1s