Unset elements using array keys

Question

So I need to delete some array elements, is there easy way not including foreach loop?

$privateData = ['id', 'date', 'whatever'];

foreach($privateData as $privateField) {
    unset($request[$privateField]);
}

I tried to search array_map array_walk functions for examples but I did not find any.

In fact, any such "way" will be internally a loop. So why worry? — Alma Do
– Alma Do, Commented Jul 30, 2014 at 9:40
I think that I read somewhere, that array_* functions are slightly faster than for example foreach — David Kudera
– David Kudera, Commented Jul 30, 2014 at 9:46
or maybe not willem.stuursma.name/2010/11/22/… :-D but this is an old article for PHP 5.3.. — David Kudera
– David Kudera, Commented Jul 30, 2014 at 9:53

deceze · Accepted Answer · 2014-07-30 09:43:09Z

1

$result = array_diff_key($request, array_flip(['id', 'date', 'whatever']));

answered Jul 30, 2014 at 9:43

deceze♦

525k89 gold badges806 silver badges954 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Barmar · Accepted Answer · 2014-07-30 09:42:59Z

0

Here's how you do it using array_map:

array_map(function($privateField) use ($request) {
    unset($request[$privateField]);
}, $privateData);

You need to use the use option to access $request from the outer scope.

I don't know why you'd want to do it this way. The foreach loop is much clearer. But since you asked.

answered Jul 30, 2014 at 9:42

Barmar

789k57 gold badges554 silver badges669 bronze badges

A loop by any other name... ;)