PHP array_intersect_key() Function
The array_intersect_key() is used to create an array containing keys and values of the first array whose keys (i.e. from the first array) are present in all other arrays.
This function compares the keys of two or more arrays, and return an array that contains the entries from array1 that are present in array2, array3, etc.
| Parameter | Description |
|---|---|
| array1 | Required. The first array is the array that the others will be compared with |
| array2 | Required. An array to be compared with the first array |
| array3,… | Optional. An array to be compared with the first array |
Syntax
array_intersect_key(array1,array2,array3...) Example
$array1=array("a"=>"Samuel","b"=>"Cooper","c"=>"James","d"=>"Alex");
$array2=array("a"=>"Samuel","b"=>"Cooper","g"=>"James");
$array3=array("a"=>"Samuel","b"=>"Cooper","g"=>"James");
$result=array_intersect_key($array1,$array2,$array3);
print_r($result);Output
Array ( [a] => Samuel [b] => Cooper )
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