php中怎么去除二维数组的某个字段?
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2022-06-03 19:50:52
...
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
2、这样运算
Array
(
[net] => Array
(
[1] => 11
[2] => 101
[3] => 1001
)
[login] => Array
(
[1] => 10001
[2] => 100001
[3] => 1000001
)
)
string(8) "70001101"
$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
回复讨论(解决方案)
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 = $str|$v; }}var_dump($str);
string(7) "1111111"
$arr = array("net" => array("on", "11", "101", "1001"), "login" => array("on", "10001","100001","1000001"));delon($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
)
)
好的,灰常感谢
2
$arr = array("net" => array("on","1", "2","4"), "login" => array("on","10001","100001","10000001"));delon($arr);$str ='';foreach ($arr as $key=>$value){ foreach ($value as $k =>$v){ $str=$str|$v; }}var_dump($str); function delon(&$arr){ foreach($arr as $key=>&$val){ foreach($val as $k=>$v){ if($v=='on'){ unset($val[$k]); } } }}
string(8) "70001101"