To get first key in an array, we can use reset
and key
in php.
reset($array);
$first_key = key($array);
It’s essentially the same as your initial code, but with a little less overhead, and it’s more obvious what is happening.
Just remember to call reset
, or you may get any of the keys in the array. You can also use end
instead of reset
to get the last key.
If you wanted the key to get the first value, reset
actually returns it:
$first_value = reset($array);
There is one special case to watch out for though (so check the length of the array first):
$arr1 = array(false);
$arr2 = array();
var_dump(reset($arr1) === reset($arr2)); // bool(true)
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