Question

我有4个月的php和mysql工作经验。我的问题是如何在我的mysql数据库表中选择一些列，并在php的html表中显示复选框并显示这些选定列的数据？请参阅下面的代码并帮我解决此问题。

复选框代码：

<form role="form" id="viewallteachers" method="POST" autocomplete="on" action="">
                    <h4>Kindly check the items to view in the table. You have a maximum of 10 items to view at a time in the table.</h4>
                    <hr>
                    <div class="row">
                        <div class="col-sm-4">
                            <div class="checkbox">
                                <label>
                                    <input type="checkbox" name="check_list[]" value="tpicture">Picture
                                </label>
                            </div>
                            <div class="checkbox">
                                <label>
                                    <input type="checkbox" name="check_list[]" value="teacherID">Teacher ID
                                </label>
                            </div>
                            <div class="checkbox">
                                <label>
                                    <input type="checkbox" name="check_list[]" value="staffID">
                                    Staff ID
                                </label>
                            </div>
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                    <button type="submit" name="btnshowcolumns" class="btn btn-primary">Save changes</button>
                    </form>

现在，下面是我的表代码，用于显示所选列的选定列和数据。

<?php  if(!empty($_POST['check_list'])) {
 $check_list = $_POST['check_list']; 
 $counter = count($check_list); 
 for($x=0; $x<=$counter; $x++){ 
   if(!empty($check_list[$x])){ 
    $sql = "SELECT `".$check_list[$x]."` FROM teachers";
$db = new PDO('mysql:host=localhost:3306;dbname=gnoc_db', 'root', 'xxxx');
       $select = $db->prepare($sql);
       $select->execute();
       while($row = $select->fetch(PDO::FETCH_ASSOC)) {
       echo '<tr>';
       foreach ($row as $key=>$value) {
            echo '<td>'.$key . ' = ' . $value .'</td>';
               }
               echo '</tr>';
                } /* END OF IF */
                 } /* END OF FOR LOOP */
        }
     }
?>
</tbody>
</table>

以下是图片： image of checkbox selecting the database columns image of table show data

Answer 1

<?php
    $columns = $_POST['check_list']; // array
    foreach($columns as $column)
    {
        $cols .= $column . ',';
    }
    $sql = "SELECT " . $cols . " FROM teachers";
    // do you stuff

Answer 2

你的列名不是逗号分隔所以只需循环遍历数组并为每个元素附加一个逗号然后在循环结束后删除最后一个逗号

<?php
    $check_list= $_POST['check_list']; // array
    foreach($colnames as $check_list)
    {
        $cols .= $colnames . ',';
    }
    $cols = substr($cols,0,strlen($cols)-1);
    $sql = "SELECT " . $cols . " FROM teachers";
    //rest of the code

?>

选中带有复选框的mysql列并在html table，php中显示数据

2 个答案: