How to remove a field from a two-dimensional array in php

How to remove a field from a two-dimensional array in php? 1. requirement: There are two-dimensional arrays. how to remove the field on & nbsp; of this array to generate a new array & nbsp; $ arr2 $ arr & nbsp; array (net & nbsp; & gt; & nbsp; array (on, & nbsp; 11, & nbsp; 101, & nbsp; 1001), & nbsp; & how to remove a field from a two-dimensional array in nbs php?
1. requirement: There are two-dimensional arrays. how to remove the field "on" of this array to generate a new array $ 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 "));
You can also remove the on when traversing.
2. you can achieve this effect.
$ 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 );
// The Value $ str, "on" cannot be calculated based on the number or operation after the value operation.



------ Solution ----------------------
1. remove this

$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. this operation

$ 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
------ Solution ----------------------
$ V;
}
}
Var_dump ($ str );

string(7) "1111111"

------ Solution ----------------------

$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] = & gt; 1001
)

[Login] => Array
(
[1] => 10001.
[2] => 100001.
[3] = & gt; 1000001
)

)