How can PHP developers ensure data integrity and accuracy when merging multiple arrays into one?

To ensure data integrity and accuracy when merging multiple arrays into one, PHP developers can use functions like array_merge() or array_merge_recursive() to combine arrays without overwriting duplicate keys. Additionally, developers can validate the data before merging to avoid any inconsistencies or conflicts.

$array1 = ['key1' => 'value1', 'key2' => 'value2'];
$array2 = ['key2' => 'new_value2', 'key3' => 'value3'];

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

print_r($mergedArray);