无法使用mysqli_fetch_assoc（$ result）从数据库获取

Question

I can not fetch rows from database and populate my select input

I have tried to populate the input by calling a function in another php file which fetches the result from the database and returns the result.

my function in getData.php:

function listTechnician(){
        global $conn;
        $position="technician";
        $sql="SELECT user.Name FROM user INNER JOIN user_account ON user.id = user_account.id WHERE user_account.position=$position";
        $result = mysqli_query($conn, $sql) or die("<script>console.log(".mysqli_error($result).")</script>");
        return mysqli_fetch_row($result) ;
    }

and my code in newAppModal.php(contains the select input to be populated):

<select class="form-control select2" id="appTime" name="appTechnician" required="">
                                    <?php 
                                    $data=listTechnician();
                                     while ($row=$data) {
                                    echo "<option>".$row['name']."</option>"; 
                                     }
                                    ?>
                                    <option selected="selected"></option>

                                    <option>Laboratory</option>


                                  </select>

this is contained in a modal

I want to populate my select input with the row fetched from database but it is giving me an error in the console like:

 main.js:388 Uncaught TypeError: Cannot read property 'addEventListener' of null
    at listenBySelector (main.js:388)
    at Calendar.bindHandlers (main.js:6619)
    at Calendar.render (main.js:6595)
    at HTMLDocument.<anonymous> (receptionist1.php:66)

and i had a calendar which now doesn't appear

Answer 1

You have a couple of issues. Firstly, listTechnician is only fetching one row of data instead of all of them. Change

return mysqli_fetch_row($result) ;

to

return mysqli_fetch_all($result);

Secondly, you are not looping through the data properly in newAppModal.php . You should do something like this:

$data=listTechnician();
foreach ($data as $row) {
    echo "<option>".$row['Name']."</option>"; 
}

Note also that the field in your query will be called Name (not name ); I have changed that in the above code too. It's possible the undefined index message for this is causing the problems with your Javascript.

Thirdly, in your SQL query, you need to enclose $position in single quotes ie

$sql="SELECT user.Name FROM user INNER JOIN user_account ON user.id = user_account.id WHERE user_account.position='$position'";

Answer 2

Html Part ".$d.""; }

  ?> <option>Laboratory</option> </select> 

PHP function .

function listTechnician(){ $mysqli_connection; $mysqli_connection = new MySQLi('localhost', '', '', 'test'); if ($mysqli_connection->connect_error) { echo "Not connected, error: " . $mysqli_connection->connect_error; }

  $position="technician"; $sql="SELECT user.Name FROM user INNER JOIN user_account ON user.id = user_account.id WHERE user_account.position='$position'"; $result = mysqli_query($mysqli_connection, $sql) or die("<script>console.log(".mysqli_error($result).")</script>"); $data=array(); while ($row= mysqli_fetch_row($result)) { $data = $row; } mysqli_close($mysqli_connection); return $data; } 

Blockquote

Answer 3

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