PHP 7.1.21 Released


(PHP 7 >= 7.3.0)

array_key_firstGets the first key of an array


mixed array_key_first ( array $array )

Get the first key of the given array without affecting the internal array pointer.



An array.

Return Values

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

See Also

  • array_key_last() - Gets the last key of an array
  • reset() - Set the internal pointer of an array to its first element
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