You could just write:

@$array['key1']['key2'];

Which will give you the same result.

@$array['key1']['key2'] ?: 'Key not found'

fl at nyggen dot com: I know this is possible. But i don't like suppressing warning in this situation. And 

@$array['key1']['key2'] ?: 'Key not found'

And the valid value could be false/0/""/"0"/[].

$val = isset($array['key1']['key2']) ?: NULL;

We already have an operator for that ($v = (iftrue) ?: defaultvalue).

Operators are also much more efficient than a function call.

@Pierre:
isset($array['key1']['key2']) ?: NULL
is the same as
isset($array['key1']['key2']) ? isset($array['key1']['key2']) : NULL
is the same as "true" if the key exists, "null" if it doesn't.

That's not what this req is about.

@niki

Arg right. But still should not be added, zero value added here.

In the case you have those keys in a variable like $keys = ['key1', 'key2'] you can access it only using a loop. That's one of the purpose of the function.

BTW what looks better and what is more readable?

$a = isset($array['a']) ? $array['a'] : null;
$b = array_key_exists('b', $array) ? $array['b'] : 'default';

or

$a = array_get($array, 'a');
$b = array_get($array, 'b', 'default');

?

And if null is considered as a valid value and the value is deep inside the array...

$d = isset($array['a']['b']['c']) && array_key_exists('d', $array['a']['b']['c']) ? $array['a']['b']['c']['d'] : 'default';

or just

array_get($array, ['a', 'b', 'c', 'd'], 'default');

It's 4Q2013 and apparently the attitude of internals as a whole is still as broken as ever.

"Zero value added"? Sure, if you say so. I guess the people who are interested in accessing nested values in scenarios where hardcoding the expected structure of the array is impossible (e.g. "key1.key2.key3" is only known at runtime) do not exist, because TO YOU this looks like "zero value".

I am not even going to bother linking to StackOverflow where people have repeatedly asked ***how to write a function*** that does this, or to components such as Laravel's Container that implement this in userland.

Keep calm and let us continue guessing if the sign of the zero f***s you give is positive or negative.

I don't know whether it's really appropriate for the framework to define this function.. surely it could be done faster in C but I'm sure this is fast enough:

if (function_exists('array_get') === false) {
    function array_get($array, $key, $default) {
        return isset($array[$key]) ? $array[$key] : $default;
    }
}