php中怎么去除二维数组的某个字段？
1，需求：有如下二维数组，怎么去除此数组的字段on  生成一个新数组 $arr2
$arr = array(net => array(on, 11, 101, 1001),
    login => array(on, 10001,100001,1000001));
$arr2 = array(net => array( 11, 101, 1001),
    login => array(10001,100001,1000001));
或者遍历时候去掉on也行
2，能达到这样的效果也可以
$arr = array(net => array(on,1, 2,4),
 login => array(on,10001,100001,10000001)
);
$str ='';
foreach ($arr as $key=>$value){
    foreach ($value as $k =>$v){
        $str=$str|$v;
    }
}
var_dump($str);
//值运算后面数字的或运算得到值$str，on这个字段是不能参加运算的
------解决思路----------------------
1、这样去掉$arr = array(
net => array(on, 11, 101, 1001),
login => array(on, 10001,100001,1000001)
);
array_walk($arr, function(&$t) {
$t = array_diff($t, array('on'));
});
print_r($arr);
array
(
[net] => array
(
[1] => 11
[2] => 101
[3] => 1001
)
[login] => array
(
[1] => 10001
[2] => 100001
[3] => 1000001
)
)

2、这样运算$arr = array(
net => array(on, 11, 101, 1001),
login => array(on, 10001,100001,1000001)
);
$str ='';
foreach ($arr as $key=>$value){
foreach ($value as $k =>$v){
if($v != 'on') $str = $str
------解决思路----------------------
$v;
}
}
var_dump($str);
string(7) 1111111

------解决思路----------------------
$arr = array(net => array(on, 11, 101, 1001),
login => array(on, 10001,100001,1000001));
delon($arr);
print_r($arr);
function delon(&$arr){
foreach($arr as $key=>&$val){
foreach($val as $k=>$v){
if($v=='on'){
unset($val[$k]);
}
}
}
}

array
(
    [net] => array
        (
            [1] => 11
            [2] => 101
            [3] => 1001
        )
[login] => array
        (
            [1] => 10001
            [2] => 100001
            [3] => 1000001
        )
)