对多维数组按某值排序的php代码

    $arr = array(
                 "0" => array(line_num => "10", occur_time => "2007-11-19 10:25:04+08"),
             　　 "1" => array(line_num => "9", occur_time => "2007-11-19 10:25:04+08"),
                　"2" => array(line_num => "25", occur_time => "2007-11-19 10:25:04+08")
                );
    print_r($arr);
    echo "";
    echo "";
    echo "";
    uasort( $arr,create_function('$a, $b', 'return $a[\'line_num\']     print_r($arr);
    echo "";
    echo "";
    echo "";
    foreach($arr as $key => $value) {
        $ar[] = $value;
    }
    print_r($ar);
?>

输出结果： Array ( [0] => Array ( [line_num] => 10 [occur_time] => 2007-11-19 10:25:04+08 ) [1] => Array ( [line_num] => 9 [occur_time] => 2007-11-19 10:25:04+08 ) [2] => Array ( [line_num] => 25 [occur_time] => 2007-11-19 10:25:04+08 ) )


Array ( [2] => Array ( [line_num] => 25 [occur_time] => 2007-11-19 10:25:04+08 ) [0] => Array ( [line_num] => 10 [occur_time] => 2007-11-19 10:25:04+08 ) [1] => Array ( [line_num] => 9 [occur_time] => 2007-11-19 10:25:04+08 ) )


Array ( [0] => Array ( [line_num] => 25 [occur_time] => 2007-11-19 10:25:04+08 ) [1] => Array ( [line_num] => 10 [occur_time] => 2007-11-19 10:25:04+08 ) [2] => Array ( [line_num] => 9 [occur_time] => 2007-11-19 10:25:04+08 ) )

>>> 更多内容，请查看 php数组排序方法大全