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# strtr

strtr -- Translate certain characters.

## Description

`string strtr`(string str, string from, string to);

This function operates on `str`, translating all occurrences of each character in `from` to the corresponding character in `to` and returning the result.

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

Example 1. Strtr() example
      1
      2 $addr = strtr($addr, "δεφ", "aao");
      3

strtr() can 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.

Examples:

      1
      2 $trans = array ("hello" => "hi", "hi" => "hello");
      3 echo strtr("hi all, I said hello", $trans) . "\n";
      4

This will show: "hello all, I said hi",

> Note: This feature (two arguments) was added in PHP 4.0.

See also ereg_replace().

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