array_key_first

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Gets the first key of an array

array_key_first ( array $array ) : mixed

array

An array.

Returns the first key of array if the array is not empty; NULL otherwise.

<? $array = array("a" => 0, "b" => 1, "c" => 2); $return = array_key_first($array); var_dump($return); ?>

string(1) "a"

PHP