Consider these 2 examples...
$key = 'jim';
// example 1
if (isset($array[$key])) {
// ...
}
// example 2
if (array_key_exists($key, $array)) {
// ...
}
I'm interested in knowing if either of these are better. I've always used the first, but have seen a lot of people use the second example on this site.
So, which is better? Faster? Clearer intent?
isset()
is faster, but it's not the same as array_key_exists()
.
array_key_exists()
purely checks if the key exists, even if the value is NULL
.
Whereas
isset()
will return false
if the key exists and value is NULL
.