Question

Basically I need to merge two arrays where the value 0 will take priority over 1.

I can’t find any native php function to do this, nor any function on google which surprised me (maybe i have been searching for the wrong things!), and I can’t think how to efficiently do it. Any suggestions?

For instance:

Array 1                   Array 2
  permission1 => 1            permission1 => 1
  permission2 => 1            permission2 => 1
  permission3 => 0            permission3 => 1
  permission4 => 0            permission4 => 1
                              permission5 => 1

The resulting array would be.

permission1 => 1
permission2 => 1
permission3 => 0
permission4 => 0
permission5 => 1

As you may have guessed this is for a permissions system. Nothing denotes no permission, 0 means never, and 1 means has permission. I thought the best solution might involve adding the two together and seeing if you get 1 or 2, but I can’t think how to implement this.

I hope this question is clear, just ask for clarification if not. Thanks in advance for suggestions.

Answer 1

foreach($array2 as $key => $val) {
   if (!isset($array1[$key])){
        $array1[$key] = $val;
   }
}