replace word with another word php code example

Example 1: php replace string within string

$new_string = str_replace( $take_out, $put_in, $string);

Example 2: php str replace

<?php
$string = str_ireplace("FoX", "CAT", "the quick brown fox jumps over the lazy dog");
echo $string; // the quick brown CAT jumps over the lazy dog
?>