php 数组排序 array_multisort rsort krsort
这里主要是rsort krsort函数，他是对键名进行反序排序了,如果要数组元素值排序用sort就成了,array_multisort这个是对多维数组排序.
<?php
$array = array(array('www.phprm.com',6,8),array(1,2,6));
print_r($array);
/*
array
(
[0] => array
(
[0] => www.phprm.com
[1] => 6
[2] => 8
)
[1] => array
(
[0] => 1
[1] => 2
[2] => 6
)
)
*/
array_multisort($array) ;//对二维数组进行排序
print_r($array);
/*
array
(
[0] => array
(
[0] => www.phprm.com
[1] => 6
[2] => 8
)
[1] => array
(
[0] => 1
[1] => 2
[2] => 6
)
)
*/
$ar = array('phprm.com',2,3,5);
rsort($ar);
print_r($ar);
/*
array
(
[0] => 5
[1] => 3
[2] => 2
[3] => phprm.com
)
*/
krsort($ar);
print_r($ar);
/*
array
(
[3] => phprm.com
[2] => 2
[1] => 3
[0] => 5
)*/
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