数组元素反转array_reverse

array_reverse(array,preserve)

参数描述array必需。规定数组。preserve可选。规定是否保留原始数组的键名。 

可能的值：

• true
• false

程序实例：

<?php
$a=array("Volvo","XC90",array("BMW","Toyota"));
$reverse=array_reverse($a);
$preserve=array_reverse($a,true);
print_r($a);
print_r($reverse);
print_r($preserve);
?>

结果：

Array ( [0] => Volvo [1] => XC90 [2] => Array ( [0] => BMW [1] => Toyota ) )

Array ( [0] => Array ( [0] => BMW [1] => Toyota ) [1] => XC90 [2] => Volvo )

Array ( [2] => Array ( [0] => BMW [1] => Toyota ) [1] => XC90 [0] => Volvo )