array_keys in php

The array_keys() function returns an array consisting of only the keys in the array in internal order:

$arrayOfKeys = array_keys(array);

Here’s an example

$person = array(‘name’ => “Fred”, ‘age’ => 35, ‘wife’ => “Wilma”);
$keys = array_keys($person); // $keys is array(“name”, “age”, “wife”)

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