I recently bumped into a nice way of removing an item from an array without using a loop when you don’t know the key of the item.
We set the item to delete into a new array and take the difference of the actual array using array_diff. The difference is of course the array without the item we want to delete. array_diff leaves a gap in the array indexes if the value we delete is not in the end of the array, in the example we would have indexes 0, 1, 3 after running array_diff. To reset the indexes, we use array_values to create a new array with the values we want.
I found this to be a nice little trick that will save a loop when you want a simple deletion.