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我正在CakePHP框架内工作,并且有以下多维数组,我需要按值进行排序。我正在使用usort
,但无法弄清如何由[ForumPost]
的孩子进行排序。用儿童的usort对多维数组排序
这里的数组:
Array
(
[0] => Array
(
[ForumPost] => Array
(
[id] => 174
[forum_id] => 81
[user_id] => 39
[title] => A test post
[1] => Array
(
[ForumPost] => Array
(
[id] => 64
[forum_id] => 208
[user_id] => 36
[title] => B test post
... etc
我的功能和呼叫是:
usort($array, array("ForumSearchesController", "cmp"));
function cmp($a, $b) {
return $a['ForumPost']['title'] - $b['ForumPost']['title'];
}
取代'美元[ 'ForumPost'] [ '标题'] - $ B [ 'ForumPost'] [ '标题']',它看起来像您刚才需要'返回strcmp($ a ['ForumPost'] ['title'],$ b ['ForumPost'] ['title']);' – 2013-03-11 13:53:55
鉴于标题是一个字符串,为什么你使用minus来比较? – 2013-03-11 13:54:17
看看PHP的usort页面上的例子3 http://php.net/manual/en/function.usort.php – Pitchinnate 2013-03-11 13:55:41