Remove element from associative array with numeric keys in PHP

Description

The following code shows how to remove element from associative array with numeric keys.

Example

/*from w  ww.  j  av a 2  s  . c o  m*/
<?php
    $a=array(0=>"red",1=>"green",2=>"blue");
    echo array_shift($a);
    print_r ($a);
?>

The code above generates the following result.