php - array_intersect_assoc

Description

array array_intersect_assoc ( array $array1, array $array2 [, array $ ...] )
array_intersect_assoc() returns an array containing all the values of array1 that are present in all the arguments. Note that the keys are used in the comparison unlike in array_intersect().

Parameters

array1

The array with master values to check.

array2

An array to compare values against.

array

A variable list of arrays to compare.

Return Values

Returns an associative array containing all the values in array1 that are present in all of the arguments.

Examples

Example 244. array_intersect_assoc() example


$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");$array2 = array("a" => "green", "yellow", "red");$result_array = array_intersect_assoc($array1, $array2);print_r($result_array);
The above example will output:

Array(

[a] => green
)

    

In our example you see that only the pair "a" => "green" is present in both arrays and thus is returned. The value "red" is not returned because in $array1 its key is 0 while the key of "red" in $array2 is 1.
The two values from the key => value pairs are considered equal only if (string) $elem1 === (string) $elem2 . In other words a strict type check is executed so the string representation must be the same.