How to remove values from an array in PHP?

Question

Is there a PHP function to remove certain array elements from an array?

E.g., I have an array (A) with values and another array (B) from which a need to remove values.

Want to remove the values in array A from array B?

Answer 1

Use array_diff()

$new_array = array_diff($arrayB, $arrayA);

will return an array with all the elements from $arrayB that are not in $arrayA.

To do this with associative arrays use array_diff_assoc().

To remove a single value use:

unset($array[$key]);

You can of course loop that to do the equivalent of the array functions but there's no point in that.