php比较多维数组中值的大小排序实现代码

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function cmp($a, $b){if ($a["vote_num"] == $b["vote_num"]) {return 0;}return ($a["vote_num"] > $b["vote_num"]) ? -1 : 1;}$arr = Array(0 => Array(o_id => 1861,o_name => 2,o_pic => 'http://g.jb51.net/image.gif' ,o_detail => 人人,vote_num => 1),1 => Array(o_id => 1844,o_name => 芭比,o_pic => 'http://upload.jb51.net/game_image/dfxxz/dfVIP.files/shenxiandao.jpg',o_detail => 也是美女呢,vote_num => 2),2 => Array(o_id => 1843,o_name => 程程,o_pic => 'http://g.jb51.net./upload_img/2011-06/31554_4d0088da7a61ad9c8c02a530be94d98e.png',o_detail => 美女哦,vote_num => 3));uasort($arr, ”cmp“);echo ‘< pre style="text-align:left" >';print_r ($arr);echo ‘< / pre >';

返回结果

Array([2] => Array([o_id] => 1843[o_name] => 程程[o_pic] => http://g.jb51.net./upload_img/2011-06/31554_4d0088da7a61ad9c8c02a530be94d98e.png[o_detail] => 美女哦[vote_num] => 3)[1] => Array([o_id] => 1844[o_name] => 芭比[o_pic] => http://upload.jb51.net/game_image/dfxxz/dfVIP.files/shenxiandao.jpg[o_detail] => 也是美女呢[vote_num] => 2)[0] => Array([o_id] => 1861[o_name] => 2[o_pic] => http://g.jb51.net/image.gif[o_detail] => 人人[vote_num] => 1))

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