What are some potential pitfalls when merging elements in an array in PHP?

One potential pitfall when merging elements in an array in PHP is accidentally overwriting existing keys with the same name. To avoid this issue, you can use the "+" operator to merge arrays, which will only include unique keys from both arrays. 

$array1 = ['a' => 1, 'b' => 2];
$array2 = ['b' => 3, 'c' => 4];

$mergedArray = $array1 + $array2;

print_r($mergedArray);

Keywords

array_merge array_merge_recursive array_combine array_intersect array_diff

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