在PHP中循环复选框

Question

我在每个表格行中都有一个复选框，我想按“保存”，它将遍历每个复选框： （如果选中） - ＆gt;进入该学生参加的数据库 else - ＆gt;输入该学生未参加的数据库。

我的PHP代码：

<table border="1" cellpadding="1" width="550px" style="text-align:center;">
    <th> Student ID </th>
    <th> First Name </th>
    <th> Last Name </th>
    <th> Class ID </th>
    <th> Attended </th>
<?php
    $classid = $_GET['classid'];

    $mysql_host='localhost';
    $mysql_user='root';
    $mysql_password='';
    $con = @mysqli_connect($mysql_host,$mysql_user,$mysql_password);

    if(!$con){
        die('Failed to connect to the database');//if not successful
    }else{
        //echo "Successfully connected to MySQL!";//if successful
        if(@mysqli_select_db($con, 'application_database')){//selecting the database
            //echo '<br>'."Connected to the specified database!";
        }else{
            die('<br>'."Could not connect to the specified database!");
        }
    }

    $sql="SELECT * FROM `student` WHERE class = '$classid'";
    $records=mysqli_query($con,$sql);

    while($student=mysqli_fetch_assoc($records)){

        echo "<tr>";
        echo "<td>".$student['id']."</td>";
        echo "<td>".$student['first_name']."</td>";
        echo "<td>".$student['last_name']."</td>";
        echo "<td>".$student['class']."</td>";
        echo "<td>".'<input type="checkbox" name="attendedCB">'."</td>";
    }

    echo '<form>';
    echo 'Teacher ID: <input type="number" name=teacher_id>';
    echo '<button name="save" type="submit">Save Attendance</button>';
    echo '</form>';


?>
</table>

我在数据库中有一个“student_attendance”表，所以我想添加每个学生以及他/她的“有人”复选框状态。干杯：D

Answer 1

// loop per student
foreach ($_POST ['student'] as $student ) {
    extract($student) // extract array (lazy)
    // if they attended 
    if ( !empty ($attendedCB )) {
        // add them
        $query = "INSERT INTO your_table id,first,last,class,attendedCB VALUES($id, $first, $last, $attendedCB)";
        // then run that query or aggregate them all into one big one and run it
    }
}

另外，将复选框名称更改为student['attendedCB']，这应该可以。

Answer 2

使用id作为复选框的值，单击获取id值。 根据id值，您可以执行操作（更新，删除，编辑）

echo "<td><input type='checkbox' name='attendedCB' value ='.$student["id"].'></td>";