PHP Basics

Strings Functions

<?php

$string = 'bac';

$stringParts = str_split($string);
sort($stringParts);
echo implode('', $stringParts);
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Regex Replacement on Strings

<?php
$string = "T34okyo!";
$replacement = "";
$pattern = "/[^a-z]/i";

echo preg_replace($pattern, $replacement, $string);
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