php insert in array

<?php

$a=array("red","green");

array_push($a,"blue","yellow");

print_r($a);
?>
 

array_push ( array &$array [, mixed $... ] ) : int
or
$array[] = $var;

$original = array( 'a', 'b', 'c', 'd', 'e' );
$inserted = array( 'x' ); // not necessarily an array, see manual quote

array_splice( $original, 3, 0, $inserted ); // splice in at position 3
// $original is now a b c x d e