What is the best approach to handling the "isDefaultPrinter" value in merged arrays in PHP?

When merging arrays in PHP that contain a key like "isDefaultPrinter" which needs to be handled carefully, the best approach is to check if the key exists in both arrays being merged and then decide how to handle the values. One way to do this is to prioritize the value from one array over the other, or to merge the values in a way that makes sense for your specific use case. 

$array1 = ['isDefaultPrinter' => false, 'name' => 'Printer A'];
$array2 = ['isDefaultPrinter' => true, 'location' => 'Office'];

if (array_key_exists('isDefaultPrinter', $array1) && array_key_exists('isDefaultPrinter', $array2)) {
    $mergedArray['isDefaultPrinter'] = $array2['isDefaultPrinter']; // prioritize value from array2
} else {
    $mergedArray['isDefaultPrinter'] = $array1['isDefaultPrinter']; // default to value from array1
}

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

print_r($mergedArray);

Keywords

PHP arrays merging isDefaultPrinter handling

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