error when looping through multidimensional array

Question

I have a function to loop through multidimensional array :

function in_multiarray($elem, $array, $field)
{
    $top = sizeof($array) - 1;
    $bottom = 0;
    while($bottom <= $top)
    {
      if($array[$bottom][$field] == $elem)
        return true;
      else 
        if(is_array($array[$bottom][$field]))
            if(in_multiarray($elem, ($array[$bottom][$field])))
                return true;
      $bottom++;
    }        
   return false;

}

Then, I use it like this :

$hoursoff = array( array("10:00" => "2016-10-07", "11:00" => "2016-10-07", "12:00" => "2016-10-07"), array("10:00" => "2016-10-08", "11:00" => "2016-10-08") );

if( in_multiarray("$date", $hoursoff, "$hour") ) { /* do it */ } else { /* don't do it */ }
 /* $date and $hour come from database request */

this works fine. But when I check my error_reporting(E_ALL); it throws

 Notice: Undefined index ...

I know it's no big deal, and does not affect results, but in order to learn from this : * which part of the script is involved in this error ? * how do I avoid having this (or what am I doing wrong) ? thanks

Possible duplicate of [PHP: "Notice: Undefined variable" and "Notice: Undefined index"](http://stackoverflow.com/questions/4261133/php-notice-undefined-variable-and-notice-undefined-index) — Epodax, Oct 05 '16 at 08:46
@RaxWeber : $date and $hour come from database request : I echo them and use them — OldPadawan, Oct 05 '16 at 09:04
Notice: Undefined index: 9:00 or Notice: Undefined index: 14:00 and so on... one for each hour that is not in the array $hoursoff — OldPadawan, Oct 05 '16 at 09:24

MounirOnGithub · Answer 1 · 2016-10-05T08:54:02.053

0

Use for loop instead of while loop as you could work with index of your array first

Then you're checking if $date exist there is no key in your array and key starting with $ is not a right index ; in your 2nd dimension index are "10:00" , "11:00" and not date or hour

edited Oct 05 '16 at 08:54

answered Oct 05 '16 at 08:48

MounirOnGithub

669
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Patrizio Bekerle · Answer 2 · 2016-10-05T10:07:20.360

0

I would also test for isset($array[$bottom]) and isset($array[$bottom][$field]) in all if statements.

edited Oct 05 '16 at 10:07

answered Oct 05 '16 at 08:49

Patrizio Bekerle

399
3
8

score 0 · Answer 3 · answered Oct 05 '16 at 08:49

0

If your multidimensionnal array doesn't have the same structure for every elements you might want to add some isset() functions to test if the array with its associated key exists before you do a test on it inside an if() statement.

answered Oct 05 '16 at 08:49

Alex

478
2
11

error when looping through multidimensional array

3 Answers3