php - Undefined Variable? Can't find the solution -


so have aquired php script checks , grabs server information servers of popular game 'minecraft'. in script seems work perfect 1 error,

notice: undefined variable: users in c:\xampp\htdocs\web-root\unnamed\share\site\fol\avatarquery.php on line 74

i have no idea why happening (i relatively new php), here's php code;

            <?php             //take username values array & grab avatars minotar.                           foreach($array_list $key => $value){$users .= "<a data-placement=\"top\" rel=\"tooltip\" style=\"display: inline-block;\" title=\"".$value."\">             <img src=\"https://minotar.net/avatar/".$value."/50\" size=\"40\" width=\"40\" height=\"40\" style=\"width: 40px; height: 40px; margin-bottom: 5px; margin-right: 5px; border-radius: 3px;\"/></a>";}             //display avatars when there players online.             if($data_general['players']['online'] > 0) {                 print_r($users);                 }             //if no avatars can shown, display error.             else {                  echo "<div class=\"alert\"> there no players online @ moment!</div>";                 }                            ?>

any , appreciated! thank you!

oh , code <img src=" line 74.

thats notice error thats warning concatenating variable doesn't yet exist.

add line above foreach remove it: 

    $users = "";     foreach($array_list $key => $value.....

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