$a=array(1,2,4,5,6);
print_r(array_reverse($a));
结果:Array ( [0] => 6
[1] => 5
[2] => 4
[3] => 2
[4] => 1 )
$a=array(1,2,4,5,6);
print_r(array_reverse($a));
结果:Array ( [0] => 6
[1] => 5
[2] => 4
[3] => 2
[4] => 1 )