Warning: mysqli_stmt::bind_result(): Number of bind variables doesn't match number of fields in prepared statement

scampbell70 · February 16, 2015

I am brand new to php and MySQL. I am working on a small project and I am getting this error and I cannot find the reason why. Can someone please help. The error is

Warning: mysqli_stmt::bind_result(): Number of bind variables doesn't match number of fields in prepared statement in C:\xampp\htdocs\test\records.php on line 134



<?php
         /*
             Allows the user to both create new records and edit existing records
         */

         // connect to the database
         include("connect-db.php");

         // creates the new/edit record form
         // since this form is used multiple times in this file, I have made it a function that is easily reusable
         function renderForm($first = '', $middle = '', $last = '', $ClientID = '', $Diagnosis = '', $Gender = '', $LevelCare = '', $Counselor = '', $error = '', $id = '')
         { ?>
             <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
             <html>
                 <head>  
                     <title>
                         <?php if ($id != '') { echo "Edit Record"; } else { echo "New Record"; } ?>
                     </title>
                     <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
                 </head>
                 <body>
                     <h1><?php if ($id != '') { echo "Edit Record"; } else { echo "New Record"; } ?></h1>
                     <?php if ($error != '') {
                         echo "<div style='padding:4px; border:1px solid red; color:red'>" . $error
                             . "</div>";
                     } ?>

                     <form action="" method="post">
                     <div>
                         <?php if ($id != '') { ?>
                             <input type="hidden" name="id" value="<?php echo $id; ?>" />
                             <p>id: <?php echo $id; ?></p>
                         <?php } ?>

                         <strong>First Name: *</strong> <input type="text" name="FirstName"
                             value="<?php echo $first; ?>"/><br/>
                             <strong>Middle Name: </strong> <input type="text" name="MiddleName"
                             value="<?php echo $middle; ?>"/>
                         <strong>Last Name: *</strong> <input type="text" name="LastName"
                             value="<?php echo $last; ?>"/>
                             <strong>Client ID: *</strong> <input type="text" name="ClientID"
                             value="<?php echo $ClientID; ?>"/>
                             <strong>Diagnosis: *</strong> <input type="text" name="Diagnosis"
                             value="<?php echo $Diagnosis; ?>"/>
                             <strong>Gender: *</strong> <input type="text" name="Gender"
                             value="<?php echo $Gender; ?>"/>
                             <strong>Level <span class="posthilit">of</span> Care: *</strong> <input type="text" name="LevelCare"
                             value="<?php echo $LevelCare; ?>"/>
                             <strong>Counselor: *</strong> <input type="text" name="Counselor"
                             value="<?php echo $Counselor; ?>"/>
                         <p>* required</p>
                         <input type="submit" name="submit" value="Submit" />
                     </div>
                     </form>
                 </body>
             </html>

         <?php }



             /*

                EDIT RECORD

             */
         // if the 'id' variable is set in the URL, we know that we need to edit a record
         if (isset($_GET['id']))
         {
             // if the form's submit button is clicked, we need to process the form
             if (isset($_POST['submit']))
             {
                 // make sure the 'id' in the URL is valid
                 if (is_numeric($_POST['id']))
                 {
                     // get <span class="posthilit">variables</span> from the URL/form
                     $id = $_POST['id'];
                     $FirstName = htmlentities($_POST['FirstName'], ENT_QUOTES);
                     $MiddleName = htmlentities($_POST['MiddleName'], ENT_QUOTES);
                     $LastName = htmlentities($_POST['LastName'], ENT_QUOTES);
                     $ClientID = htmlentities($_POST['ClientID'], ENT_QUOTES);
                     $Diagnosis = htmlentities($_POST['Diagnosis'], ENT_QUOTES);
                     $Gender = htmlentities($_POST['Gender'], ENT_QUOTES);
                     $LevelCare = htmlentities($_POST['LevelCare'], ENT_QUOTES);
                     $Counselor = htmlentities($_POST['Counselor'], ENT_QUOTES);

                     // check that FirstName, LastName and ClientID are not empty
                     if ($FirstName == '' || $MiddleName == '' || $LastName == '' || $ClientID == '' || $Diagnosis == '' || $Gender == '' || $LevelCare == '' || $Counselor == '')
                     {
                         // if they are empty, show an error message and display the form
                         $error = 'ERROR: Please fill in all required fields!';
                         renderForm($FirstName, $MiddleName, $LastName, $ClientID, $Diagnosis, $Gender, $LevelCare, $Counselor, $error, $id);
                     }
                     else
                     {
                         // if everything is fine, update the record in the database
                         if ($stmt = $mysqli->prepare("UPDATE clients SET FirstName = ?, MiddleName = ?, LastName = ?, ClientID = ?, Diagnosis = ?, Gender = ?, LevelCare = ?, Counselor = ? WHERE id=?"))
                         {
                             $stmt->bind_param("ssssssssi", $FirstName, $MiddleName, $LastName, $ClientID, $Diagnosis, $Gender, $LevelCare, $Counselor, $id);
                                 $stmt->execute();
                                 $stmt->close();
                         }
                         // show an error message if the query has an error
                         else
                         {
                             echo "ERROR: could not prepare SQL statement.";
                         }

                         // redirect the user once the form is updated
                         header("Location: view-paginated.php");
                     }
                 }
                 // if the 'id' variable is not valid, show an error message
                 else
                 {
                     echo "Error!";
                 }
             }
             // if the form hasn't been submitted yet, get the info from the database and show the form
             else
             {
                 // make sure the 'id' value is valid
                 if (is_numeric($_GET['id']) && $_GET['id'] > 0)
                 {
                     // get 'id' from URL
                     $id = $_GET['id'];

                     // get the record from the database
                     if($stmt = $mysqli->prepare("SELECT * FROM clients WHERE id=?"))
                     {
                         $stmt->bind_param("i", $id);
                         $stmt->execute();

                         $stmt->bind_result($id, $FirstName, $MiddleName, $LastName, $ClientID, $Diagnosis, $Gender, $LevelCare, $Counselor);
                         $stmt->fetch();

                         // show the form
                         renderForm($FirstName, $MiddleName, $LastName, $ClientID, $Diagnosis, $Gender, $LevelCare, $Counselor, NULL, $id);

                         $stmt->close();
                     }
                     // show an error if the query has an error
                     else
                     {
                         echo "Error: could not prepare SQL statement";
                     }
                 }
                 // if the 'id' value is not valid, redirect the user back to the view.php page
                 else
                 {
                     header("Location: view.php");
                 }
             }
         }



             /*

                NEW RECORD

             */
         // if the 'id' variable is not set in the URL, we must be creating a new record
         else
         {
             // if the form's submit button is clicked, we need to process the form
             if (isset($_POST['submit']))
             {
                 // get the form data
                 $FirstName = htmlentities($_POST['FirstName'], ENT_QUOTES);
                 $MiddleName = htmlentities($_POST['MiddleName'], ENT_QUOTES);
                 $LastName = htmlentities($_POST['LastName'], ENT_QUOTES);
                 $ClientID = htmlentities($_POST['ClientID'], ENT_QUOTES);
                 $Diagnosis = htmlentities($_POST['Diagnosis'], ENT_QUOTES);
                 $Gender = htmlentities($_POST['Gender'], ENT_QUOTES);
                 $LevelCare = htmlentities($_POST['LevelCare'], ENT_QUOTES);
                 $Counselor = htmlentities($_POST['Counselor'], ENT_QUOTES);

                 // check that FirstName and LastName are both not empty
                 if ($FirstName == '' || $MiddleName == '' || $LastName == '' || $ClientID == '')
                 {
                     // if they are empty, show an error message and display the form
                     $error = 'ERROR: Please fill in all required fields!';
                     renderForm($FirstName, $MiddleName, $LastName, $ClientID, $Diagnosis, $Gender, $LevelCare, $LevelCare, $Counselor, $error);
                 }
                 else
                 {
                     // insert the new record into the database
                     if ($stmt = $mysqli->prepare("INSERT clients (FirstName, MiddleName, LastName, ClientID, Diagnosis, Gender, LevelCare, Counselor) VALUES (?, ?, ?, ?, ?, ?, ?, ?)"))
                     {
                         $stmt->bind_param("ssssssss", $FirstName, $MiddleName, $LastName, $ClientID, $Diagnosis, $Gender, $LevelCare, $Counselor);
                         $stmt->execute();
                         $stmt->close();
                     }
                     // show an error if the query has an error
                     else
                     {
                         echo "ERROR: Could not prepare SQL statement.";
                     }

                     // redirec the user
                     header("Location: view.php");
                 }

             }
             // if the form hasn't been submitted yet, show the form
             else
             {
                 renderForm();
             }
         }

         // close the mysqli connection
         $mysqli->close();
     ?>

mac_gyver · February 16, 2015

the error is telling you what the problem is. the number of fields/columns you SELECT'ed in the query with the * doesn't match what you bound with the bind_result() statement.

when you have reached the point of using prepared queries, it's best to list out each field/column you are selecting. this will also prevent problems should the order of the fields/columns in your database table get changed since you can see what exact fields/columns you are selecting and what order they will be in the fetched rows in the result set.

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Warning: mysqli_stmt::bind_result(): Number of bind variables doesn't match number of fields in prepared statement

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