swap two words in a string php

Question

Suppose there\'s a string \"foo boo foo boo\" I want to replace all fooes with boo and booes with foo. Expected output is \"boo foo boo foo\". What I get is \"foo foo foo fo

Answer 1

First foo to zoo. Then boo to foo and last zoo to boo

$search = array('foo', 'boo', 'zoo');
$replace = array('zoo', 'foo', 'boo');
echo str_replace($search, $replace, $string);