array_intersect_assoc
(PHP 4 >= 4.3.0)
array_intersect_assoc -- Computes the intersection of arrays
with additional index check
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().
Example 1. array_intersect_assoc() example
<?php
$array1 = array("a" => "green", "b"
=> "brown", "c" => "blue",
"red");
$array2 = array("a" => "green", "yellow",
"red");
$result_array = array_intersect_assoc($array1, $array2);
?>
$result_array will look like:
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 otherwords
a strict type check is executed so the string representation
must be the same.
See also array_intersect(), array_diff() and array_diff_assoc().
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