What is the best approach to merging arrays in PHP while maintaining key order?

When merging arrays in PHP using functions like array_merge, the resulting array may not maintain the original key order. To maintain the key order while merging arrays, you can use the "+" operator in PHP. This operator merges arrays without reindexing numeric keys and preserves the original key order. 

$array1 = ['a' => 1, 'b' => 2, 'c' => 3];
$array2 = ['d' => 4, 'e' => 5, 'f' => 6];

$mergedArray = $array1 + $array2;

print_r($mergedArray);

Keywords

array_merge array_merge_recursive ksort krsort array_replace

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