What is the recommended approach for appending arrays in PHP to avoid performance issues?

Appending arrays in PHP can lead to performance issues, especially when dealing with large arrays. To avoid these issues, it is recommended to use the `array_merge()` function instead of the `+` operator for appending arrays. This is because the `+` operator creates a new array and copies all elements from both arrays, which can be inefficient for large arrays. Using `array_merge()` merges the arrays without creating a new array, resulting in better performance. 

// Example of appending arrays in PHP using array_merge()
$array1 = [1, 2, 3];
$array2 = [4, 5, 6];

$mergedArray = array_merge($array1, $array2);

print_r($mergedArray);

Keywords

array_merge array_push splat operator array_combine array_merge_recursive

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