復制代碼 代碼如下:

<?php
$a=array("a"=>"Cat","b"=>"Dog");
array_unshift($a,"Horse");
print_r($a);
?>

復制代碼 代碼如下:

<?php
$a=array("a"=>"Cat","b"=>"Dog");
print_r(array_unshift($a,"Horse"));
?>

復制代碼 代碼如下:

<?php
$a=array(0=>"Cat",1=>"Dog");
array_unshift($a,"Horse");
print_r($a);
?>