Looping a multidimensional array in php

Question

I have a multidimensional array like this:

array(2) {
  [1]=>
  array(3) {
    ["eventID"]=>
    string(1) "1"
    ["eventTitle"]=>
    string(7) "EVENT 1"
    ["artists"]=>
    array(3) {
      [4]=>
      array(2) {
        ["name"]=>
        string(8) "ARTIST 1"
        ["description"]=>
        string(13) "artist 1 desc"
        ["links"]=>
        array(2) {
          [1]=>
          array(2) {
            ["URL"]=>
            string(22) "http://www.artist1.com"
          }
          [6]=>
          array(2) {
            ["URL"]=>
            string(24) "http://www.artist1-2.com"
          }
        }
      }
      [5]=>
      array(2) {
        ["name"]=>
        string(8) "ARTIST 8"
        ["description"]=>
        string(13) "artist 8 desc"
        ["links"]=>
        array(1) {
          [8]=>
          array(2) {
            ["URL"]=>
            string(22) "http://www.artist8.com"
          }
        }
      }
      [2]=>
      array(2) {
        ["ime"]=>
        string(8) "ARTIST 5"
        ["opis"]=>
        string(13) "artist 5 desc"
        ["links"]=>
        array(1) {
          [9]=>
          array(2) {
            ["URL"]=>
            string(22) "http://www.artist5.com"
          }
        }
      }
    }
  }
  [2]=>
  array(3) {
    ["eventID"]=>
    string(1) "2"
    ["eventTitle"]=>
    string(7) "EVENT 2"
    ["artists"]=>
    array(3) {
      [76]=>
      array(2) {
        ["name"]=>
        string(9) "ARTIST 76"
        ["description"]=>
        string(14) "artist 76 desc"
        ["links"]=>
        array(1) {
          [13]=>
          array(2) {
            ["URL"]=>
            string(23) "http://www.artist76.com"
          }
        }
      }
      [4]=>
      array(2) {
        ["name"]=>
        string(8) "ARTIST 4"
        ["description"]=>
        string(13) "artist 4 desc"
        ["links"]=>
        array(1) {
          [11]=>
          array(2) {
            ["URL"]=>
            string(22) "http://www.artist4.com"
          }
        }
      }
    }
  }
}

I would like to make html output like this:

--

EVENT 1
ARTIST 1
artist 1 desc
http://www.artist1.com, http://www.artist1-2.com

ARTIST 8
artist 8 desc
http://www.artist8.com

ARTIST 5
artist 5 desc
http://www.artist5.com

--

EVENT 2
ARTIST 76
artist 76 desc
http://www.artist76.com

ARTIST 4
artist 4 desc
http://www.artist4.com

--

etc.

I'm confused about digging deeper and deeper in arrays, especially when my array keys are not sequential numbers but IDs of artist/link/etc.
These arrays will kill me, honestly! =)

Thanks for any help in advance!!!

Answer 1

You're best using the foreach construct to loop over your array. The following is untested and is off the top of my head (and probably therefore not as thought through as it should be!) but should give you a good start:

foreach ($mainArray as $event)
{
  print $event["eventTitle"];

  foreach ($event["artists"] as $artist)
  {
     print $artist["name"];
     print $artist["description"];

     $links = array();
     foreach ($artist["links"] as $link)
     {
       $links[] = $link["URL"];
     }
     print implode(",", $links);
  }
}