How can PHP developers avoid duplicate elements like "doppelteer rand" in their code?

To avoid duplicate elements like "doppelteer rand" in PHP code, developers can use the array_unique() function to remove duplicate elements from an array. This function will return a new array with only unique elements, eliminating the need to manually check for and remove duplicates.

$originalArray = ["doppelteer", "rand", "doppelteer"];
$uniqueArray = array_unique($originalArray);
print_r($uniqueArray);