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The PHP array_intersect_assoc() function compares arrays and returns the intersection of two arrays (comparing key names and key values).
array array_intersect_assoc ( array $array1, array $array2 [, array $array3 ...] );
array_intersect_assoc() returns an array that contains all the values that1 also appear in all other parameter arrays. Note that unlike array_intersect(), the key name is also used for comparison.
| Serial Number | Parameters and Description |
|---|---|
| 1 | array1(Required) The first array is the array that other arrays will be compared with. |
| 2 | array2(Required) This is an array to be compared with the first array |
| 3 | array3(Optional) This is an array to be compared with the first array |
Returns an array that contains all the values that1 also appear in all other parameter arrays.
array_intersect_assoc() function calculates the intersection of arrays with index checking
<?php
$input1 = array("a" => "black", "red", "blue");
$input2 = array("a" => "black", "yellow", "red");
$result = array_intersect_assoc($input1, $input2);
print_r($result);
?>Test and see‹/›Output result：
Array ( [a] => black )