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 wh

Answer 1

I came accros this post looking for a way to remove one single value from an array (which the title states). Here is a straight forward way, assuming the value to remove is in the array:

$list = array('foo', 'bar', 'yay', '\o/');
$toremove = 'foo';
unset($list[array_search($toremove, $list)]);

Though this will throw errors if the element to remove is not part of the array.

Another solution, but not really optimised performance wise is:

$list = array('foo', 'bar', 'yay', '\o/');
$toremove = 'foo';
$list = array_flip($list);
unset($list[$toremove]);
$list = array_flip($list);

Anyway, perhaps creating an array with the single value as using array_diff as suggested by everyone here is quicker and more efficient.