What is the purpose of the array_keys function in PHP?

The array_keys function in PHP is used to return all the keys or a subset of the keys of an array. This can be useful when you need to access or manipulate the keys of an array separately from the values. It can also be used to search for a specific key within an array. 

// Example of using array_keys function to get all the keys of an array
$array = array("a" => 1, "b" => 2, "c" => 3);
$keys = array_keys($array);
print_r($keys);

Keywords

PHP array_keys function associative array key extraction

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