array_keys

PHP 4, PHP 5, PHP 7, PHP 8
array_keys - Return all the keys or a subset of the keys of an array

array_keys( array$array ): array
arrayarray_keys arrayarray mixedsearch_value boolstrictfalse

Parameters

array

An array containing keys to return.

search_value

If specified, then only keys containing this value are returned.

strict

Determines if strict comparison (===) should be used during the search.

Return Values

Returns an array of all the keys in array.

Related Functions

Example of array_keys

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