Replace the string with value in associative array in PHP

Description

The following code shows how to replace the string with value in associative array.

Example

  //w w w  .  ja  va  2  s  . c  o  m
<?php
    $arr = array("Hello" => "Hi", "world" => "earth");
    echo strtr("Hello world",$arr);
?>

The code above generates the following result.