php数组过滤问题？
程序员文章站
2022-06-08 19:31:58
...
怎么把类似这样的数组过
["Q"] => array(4) {
[0] => array(11) {
["id"] => string(1) "1"，["k"] => string(1) "Q"
}
[1] => array(11) {
["id"] => string(1) "2"，["k"] => string(1) "H"
}
[2] => array(11) {
["id"] => string(1) "3"， ["k"] => string(1) "V"
}
[3] => array(11) {
["id"] => string(1) "4"， ["k"] => string(1) "V"
}
}
["V"] => array(4) {
[0] => array(11) {
["id"] => string(1) "1"，["k"] => string(1) "Q"
}
[1] => array(11) {
["id"] => string(1) "2"，["k"] => string(1) "H"
}
[2] => array(11) {
["id"] => string(1) "3"， ["k"] => string(1) "V"
}
[3] => array(11) {
["id"] => string(1) "4"， ["k"] => string(1) "V"
}
}
["H"] => array(4) {
[0] => array(11) {
["id"] => string(1) "1"，["k"] => string(1) "Q"
}
[1] => array(11) {
["id"] => string(1) "2"，["k"] => string(1) "H"
}
[2] => array(11) {
["id"] => string(1) "3"， ["k"] => string(1) "V"
}
[3] => array(11) {
["id"] => string(1) "4"， ["k"] => string(1) "V"
}
}
滤成这样
["Q"] => array(1) {
[0] => array(11) {
["id"] => string(1) "1"
["k"] => string(1) "Q"
}
}
["V"] => array(2) {
[0] => array(11) {
["id"] => string(1) "3"
["k"] => string(1) "V"
}
[1] => array(11) {
["id"] => string(1) "4"
["k"] => string(1) "V"
}
}
["H"] => array(1) {
[0] => array(11) {
["id"] => string(1) "2"
["k"] => string(1) "H"
}
}
回复内容：
怎么把类似这样的数组过
["Q"] => array(4) {
[0] => array(11) {
["id"] => string(1) "1"，["k"] => string(1) "Q"
}
[1] => array(11) {
["id"] => string(1) "2"，["k"] => string(1) "H"
}
[2] => array(11) {
["id"] => string(1) "3"， ["k"] => string(1) "V"
}
[3] => array(11) {
["id"] => string(1) "4"， ["k"] => string(1) "V"
}
}
["V"] => array(4) {
[0] => array(11) {
["id"] => string(1) "1"，["k"] => string(1) "Q"
}
[1] => array(11) {
["id"] => string(1) "2"，["k"] => string(1) "H"
}
[2] => array(11) {
["id"] => string(1) "3"， ["k"] => string(1) "V"
}
[3] => array(11) {
["id"] => string(1) "4"， ["k"] => string(1) "V"
}
}
["H"] => array(4) {
[0] => array(11) {
["id"] => string(1) "1"，["k"] => string(1) "Q"
}
[1] => array(11) {
["id"] => string(1) "2"，["k"] => string(1) "H"
}
[2] => array(11) {
["id"] => string(1) "3"， ["k"] => string(1) "V"
}
[3] => array(11) {
["id"] => string(1) "4"， ["k"] => string(1) "V"
}
}
滤成这样
["Q"] => array(1) {
[0] => array(11) {
["id"] => string(1) "1"
["k"] => string(1) "Q"
}
}
["V"] => array(2) {
[0] => array(11) {
["id"] => string(1) "3"
["k"] => string(1) "V"
}
[1] => array(11) {
["id"] => string(1) "4"
["k"] => string(1) "V"
}
}
["H"] => array(1) {
[0] => array(11) {
["id"] => string(1) "2"
["k"] => string(1) "H"
}
}
array(
array(
'id'=>1,
'k'=>'Q'
),
array(
'id'=>2,
'k'=>'H'
),
array(
'id'=>3,
'k'=>'V'
),
array(
'id'=>4,
'k'=>'V'
),
),
'V'=>array(
array(
'id'=>1,
'k'=>'Q'
),
array(
'id'=>2,
'k'=>'H'
),
array(
'id'=>3,
'k'=>'V'
),
array(
'id'=>4,
'k'=>'V'
),
),
'H'=>array(
array(
'id'=>1,
'k'=>'Q'
),
array(
'id'=>2,
'k'=>'H'
),
array(
'id'=>3,
'k'=>'V'
),
array(
'id'=>4,
'k'=>'V'
),
),
);
echo '';
print_r($arr);
$new_arr = array();
foreach($arr as $key=>$val) {
foreach($val as $k=>$v) {
if($key == $v['k']) {
$new_arr[$key][] = $v;
}
}
}
echo '
';
print_r($new_arr);
array_filter($arr,fun);
fun里面用数组的key去和k判断，不等于的unset掉
$keys = array_keys($arr);
$newArr = array();
$i = 0;
foreach ($arr as $key => $value) {
$newArr[$key] = array_filter($value, function ($val) {
GLOBAL $keys;
GLOBAL $i;
return $val["k"] == $keys[$i];
});
$i++;
}