php - Call to a member function fetch() on boolean in a sql request -


i trying fix bug php webpage, console returns me error : don't know how fix this.

[tue sep 12 10:04:36 2017] ::1:49319 [200]: /extranet_administrateur/questionnaire.php?id_site=1422 - call member function fetch() on boolean in /users/neqodev/desktop/cks-ocm-v3/extranet_administrateur/questionnaire.php on line 444

<?php     while ($donnees = $req->fetch())     {         $n = $n+1;         $id_theme_question_q = $donnees['id_theme_question_q'];         $nom_formsqlcategorie = $donnees['nom'];          $reponse = $bdd->query("select * question_q id_site = $id_site , id_theme = '$id_theme_question_q' $requete_restriction");         $nbtotal = 0;         $nbrepondu = 0;         while ($donneesstotal = $reponse->fetch())         {             $nbtotal++;             if($donneesstotal['cignore']=='1' || !($donneesstotal['reponse_form']=='' ||$donneesstotal['reponse_form']==null)){                 $nbrepondu++;             }         }         $nbnonrepondu = $nbtotal - $nbrepondu;          $pourcentage = $nbrepondu * 100 / $nbtotal;         $pourcentage = number_format($pourcentage,2);         $pourcentage_arr = floor($pourcentage);         if($nbtotal==0){             $pourcentage = 100;             $pourcentage_arr = floor($pourcentage);         } ?>

thanks ! ;)

the $reponse variable 0 (boolean false) because select-statement returns 0 results

anyway, i'd suggest check errors after sql statement

$reponse = $bdd->query("select * question_q id_site = $id_site , id_theme = '$id_theme_question_q' $requete_restriction");

if (!$response) {     print_r($bdd->errorinfo());     exit; }

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