Is the behavior observed in the code snippet a bug in PHP version 5.4.7 or an expected outcome?

The behavior observed in the code snippet is an expected outcome in PHP version 5.4.7. In this version, the `array_merge` function does not preserve numeric keys when merging arrays. To solve this issue, you can use the `+` operator to merge arrays, which will preserve numeric keys. 

$array1 = array(0 => 'a', 1 => 'b', 2 => 'c');
$array2 = array(3 => 'd', 4 => 'e', 5 => 'f');

$mergedArray = $array1 + $array2;

print_r($mergedArray);

Keywords

PHP version 5.4.7 code snippet behavior bug expected outcome

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