# strtr

(PHP 4, PHP 5)

strtr — Translate certain characters

### Description

string strtr ( string `$str` , string `$from` , string `$to` )
string strtr ( string `$str` , array `$replace_pairs` )

This function returns a copy of `str` , translating all occurrences of each character in `from` to the corresponding character in `to` .

If `from` and `to` are different lengths, the extra characters in the longer of the two are ignored.

Example#1 strtr() example

`<?php
$addr = strtr($addr, "äåö", "aao");
?>`

strtr() may be called with only two arguments. If called with two arguments it behaves in a new way: `from` then has to be an array that contains string -> string pairs that will be replaced in the source string. strtr() will always look for the longest possible match first and will *NOT* try to replace stuff that it has already worked on.

Example#2 strtr() example with two arguments

`<?php
$trans = array("hello" => "hi", "hi" => "hello");
echo strtr("hi all, I said hello", $trans);
?>`

This will show:

    hello all, I said hi

> Note: This optional `to` and `from` parameters were added in PHP 4.0.0

See also ereg_replace().