What are common pitfalls when using array_diff() function in PHP?

One common pitfall when using the array_diff() function in PHP is that it only compares values and not keys. If you need to compare arrays with both keys and values, you can use the array_diff_assoc() function instead. This will ensure that both the keys and values are compared when finding the differences between arrays. 

$array1 = array("a" => "apple", "b" => "banana", "c" => "cherry");
$array2 = array("a" => "apple", "b" => "banana", "d" => "date");

$diff = array_diff_assoc($array1, $array2);

print_r($diff);

Keywords

array_diff PHP arrays comparison elements

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