php extract remove characters from string code example

Example 1: php remove text from string

<?php
  //Replace the characters "world" in the string "Hello world!" with "Peter":
echo str_replace("world","Peter","Hello world!");
?>

Example 2: php regex remove characters from string

// not case sensetive replace
// use "/[..]/i" for case sensetivie result
$string = preg_replace("/[aeiou]/", '', $string);