Insert the element to an array and get the return value in PHP

Description

The following code shows how to insert the element to an array and get the return value.

Example

/*w  w w .j a  v  a2 s . co  m*/
<?php
    $a=array("a"=>"red","b"=>"green");
    print_r(array_unshift($a,"blue"));
?>

The code above generates the following result.