Question

lets say from zero to more is important level of the value

  # very imporant
  0 =>
    array
      'index' => string 'helloworld:Index' (length=16)
      404 => string 'helloworld:Missinga' (length=19)
      503 => string 'helloworld:Offline' (length=18)
      'nojs' => string 'helloworld:Nojs' (length=15)
      'blog' => string 'helloworld:blog' (length=15)
  # important
  1 => 
    array
      'index' => string 'helloworld:Index' (length=16)
      404 => string 'helloworld:Missingb' (length=19)
      503 => string 'helloworld:Offline' (length=18)
      'nojs' => string 'helloworld:Nojs' (length=15)
      'blogb' => string 'helloworld:blog' (length=15)
  # not that important
  2 => 
    array
      'index' => string 'helloworld:Index' (length=16)
      404 => string 'helloworld:Missingc' (length=19)
      503 => string 'helloworld:Offline' (length=18)
      'nojs' => string 'helloworld:Nojs' (length=15)
       'more' => string 'helloworld:Nojs' (length=15)
  # so on

join them into one array to something like this

    array
      'index' => string 'helloworld:Index' (length=16) # from 0 ( others same key )
      404 => string 'helloworld:Missinga' (length=19)  # from 0 ( others same key )
      503 => string 'helloworld:Offline' (length=18)   # from 0 ( others same key )
      'nojs' => string 'helloworld:Nojs' (length=15)   # from 0 ( others same key )
      'blog' => string 'helloworld:blog' (length=15)   # from 0 ( new )
      'blogb' => string 'helloworld:blog' (length=15)  # from 1 ( new )
      'more' => string 'helloworld:Nojs' (length=15)   # from 2 ( new )

1. when the key is different = append
2. when the key is same = check important level get one highest level

question what is the best way we can merge multiple into array but something like this?

thanks for looking in

Adam Ramadhan

Answer 1

You can do this

$array1 + $array2 + array3;

Unlike array_merge(), the one with the most importance goes first, and numeric keys are respected.

If, like in your question, you are merging array elements in the same array, you can do

$result = array();
foreach ($array as $value) { $result += $value; }