Php 查找匹配值的数组键
我尝试获取匹配值的数组键。 看起来是这样的:Php 查找匹配值的数组键,php,arrays,variables,matching,Php,Arrays,Variables,Matching,我尝试获取匹配值的数组键。 看起来是这样的: $someId = 2 $array[0][id] = "1"; $array[0][firstname] = "dude1"; $array[1][id] = "2"; $array[1][firstname] = "dude2"; $array[2][id] = "3"; $array[2][firstname] = "dude3"; 如何通过将变量“$someId=2”与数组中的唯一id($array[1][id])匹
$someId = 2
$array[0][id] = "1";
$array[0][firstname] = "dude1";
$array[1][id] = "2";
$array[1][firstname] = "dude2";
$array[2][id] = "3";
$array[2][firstname] = "dude3";
如何通过将变量“$someId=2”与数组中的唯一id($array[1][id])匹配来获取数组键,例如“1”($array[1])
基本上:$someId==$array[x][id]>返回匹配的数组$array[x]。一个简单的
foreach
就可以:
$someId = 2;
foreach($array as $person)
{
if($person['id'] == $someId)
{
// found a match, do something with $person
// ...
break; // remove the break if you want to continue searching after a match
}
}
如果您想要钥匙,请更改为
foreach($array as $key => $person)
数组_filter()保留关联性
$result = array_filter(
$array,
function ($item) use ($personId) {
return ($item['id'] == $personId);
}
);
var_dump(array_keys($result));