(PHP 5 >= 5.1.0RC1)array_intersect_ukey -- Computes the intersection of arrays using a callback function on the keys for comparison
array_intersect_ukey() returns an array
containing all the values of
which have matching keys that are present in all the arguments.
This comparison is done by a user supplied callback function. It must return an integer less than, equal to, or greater than zero if the first key is considered to be respectively less than, equal to, or greater than the second.
Example 1. array_intersect_ukey() example
The above example will output:
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
See also array_diff(), array_udiff() array_diff_assoc(), array_diff_uassoc(), array_udiff_assoc(), array_udiff_uassoc(), array_diff_key(), array_diff_ukey(), array_intersect(), array_intersect_assoc(), array_intersect_uassoc() and array_intersect_key().