Are there any potential pitfalls to be aware of when copying and merging arrays in PHP, especially when dealing with complex sorting rules like in the provided example?

When copying and merging arrays in PHP, especially when dealing with complex sorting rules, a potential pitfall to be aware of is losing the original keys of the arrays during the merge process. To solve this issue, you can use the `+` operator to merge arrays without reindexing the keys. 

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

// Merge arrays without reindexing keys
$mergedArray = $array1 + $array2;

// Output the merged array
print_r($mergedArray);

Keywords

array_merge array_copy sorting rules multidimensional arrays potential errors

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