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关于PHP数组操作的问题

WBOY
WBOYOriginal
2016-06-20 12:26:51908browse

$temp = array('k1'=>array('m1' => '1' ,'m2' => '2'),'k2'=>array('m1'=>'3','m2'=>'4'));
像上面结构数组,进行一下操作应该怎么做比较合理
1.删除$temp 数组中 key值是 ‘m1’ 的元素
2.对$temp 数组 以 key值  ‘m1'、'm2'  进行以指定顺序的排序
目前我能想到的都是使用 foreach 来便利数组进行操作,如果这个数组比较大时,感觉效率不高,又更好的方法吗?


回复讨论(解决方案)

遍历总是需要的,不然你就不知道谁该操作,谁不该操作
不过由谁遍历,是有讲究的

$temp = array('k1'=>array('m1' => '1' ,'m2' => '2'),'k2'=>array('m1'=>'3','m2'=>'4'));array_walk($temp, function(&$v) { unset($v['m2']);});print_r($temp);
Array(    [k1] => Array        (            [m1] => 1        )    [k2] => Array        (            [m1] => 3        ))

$temp = array('k1'=>array('m1' => '1' ,'m2' => '2'),'k2'=>array('m1'=>'3','m2'=>'4'));$newArray = array();print_r(array_map("mysort",$newArray,$temp));function mysort($v1,$v2){    $v1['m2'] = $v2['m1'];    $v1['m1'] = $v2['m2'];    return $v1;}


关于排序,我借鉴你得思路写。您还有更好的方法吗?

什么排序,这样?

array_walk($temp, function(&$v) { krsort($v);});print_r($temp);/*Array(    [k1] => Array        (            [m2] => 2            [m1] => 1        )    [k2] => Array        (            [m2] => 4            [m1] => 3        ))*/

$temp = array('k1'=>array('m1' => '1' ,'m2' => '2'),'k2'=>array('m1'=>'3','m2'=>'4'));array_walk($temp, function(&$v) { krsort($v);});print_r($temp);
Array(    [k1] => Array        (            [m2] => 2            [m1] => 1        )    [k2] => Array        (            [m2] => 4            [m1] => 3        ))

我的意思是  原来的KEY值顺序是  ‘m1’、'm2' ,想要得到 的顺序是 'm2'、'm1' 。只是按照自定义规则改变数组key的顺序,不考虑具体元素的值。
原数组
Array
(
    [0] => Array
        (
            [m2] => 1
            [m1] => 2
        )

    [1] => Array
        (
            [m2] => 3
            [m1] => 4
        )

)
新数组
Array
(
    [0] => Array
        (
            [m2] => 1
            [m1] => 2
        )

    [1] => Array
        (
            [m2] => 3
            [m1] => 4
        )

)

$temp = array('k1'=>array('m1' => '1' ,'m2' => '2'),'k2'=>array('m1'=>'3','m2'=>'4'));$k = array('m2', 'm1');array_walk($temp, function(&$v) use ($k) { $v = array_combine($k, $v);});print_r($temp);

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