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array_intersect_keyComputes the intersection of arrays using keys for comparison Description
array array_intersect_key
( array
$array1
, array $array2
[, array $...
] )
array_intersect_key returns an array
containing all the entries of Parameters
Return Values
Returns an associative array containing all the entries of
Examples
Example #1 array_intersect_key example
<?php The above example will output: array(2) { ["blue"]=> int(1) ["green"]=> int(3) }
In our example you see that only the keys 'blue'
and 'green' are present in both arrays and thus
returned. Also notice that the values for the keys
'blue' and 'green' differ between
the two arrays. A match still occurs because only the keys are checked.
The values returned are those of The two keys from the key => value pairs are considered equal only if (string) $key1 === (string) $key2 . In other words a strict type check is executed so the string representation must be the same. See Also
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