How can one remove duplicate keys in an associative array in PHP?

To remove duplicate keys in an associative array in PHP, you can use the array_flip() function to flip the keys and values, which will automatically remove any duplicate keys. Then, you can use the array_flip() function again to revert the array back to its original form. 

// Sample associative array with duplicate keys
$array = array("a" => 1, "b" => 2, "a" => 3);

// Remove duplicate keys
$array = array_flip($array);
$array = array_flip($array);

// Output the array without duplicate keys
print_r($array);

Keywords

PHP associative array remove duplicate keys array_unique array_values

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