[nflug] PHP question

[John Nichel]

Rob Dege wrote:
> A question for the PHP gurus out there.  I am using this function on a 
> webpage:
> 
> function list_admins($admin_array) {
>  $i = 0;
>  while ($admin_array[$i][0])
>    {
>      echo "\n    <option value={$admin_array[$i][0]}>
> {$admin_array[$i][1]} \n";
>      $i++;
>    }
> }
> 
> 
> The function works correctly, and the info is echo'd to the webpage.
> However, I get an error message in the apache logs, which I am unable
> to decipher:
> 
> [error] PHP Notice:  Undefined offset:  6 in system_functions.php on 
> line 117
> 
> The line it errors on is the 'while ($admin_array[$i][0])' statement.
> Does anyone know what it's complaining about?
> 

$admin_array[6][0] is not set.

Do a print_r on your array, and you can see the values.

It's not an error, and you can ignore it, but it's sloppy.  I'm more of 
a foreach guy myself....

foreach ( $admin_array as $admin ) {
	if ( isset ( $admin[0] ) && isset ( $admin[1] ) ) {
		//  both the variables you need are set, so you can
		//  safely work with them
		...some code...
	}
}

If you don't want empty values being output to the screen, you can also 
add !empty($var_name) to the isset line.

-- 
John C. Nichel IV
System Administrator (ÜberGeek)
KegWorks
http://www.kegworks.com
716.362.9212 x16
john at kegworks.com