具有一种形式的两个不同的单选按钮，并使用php发布

Question

I am stuck with this code, trying to post 2 different radio group my problem is I want to make the user to check 1 radio button for ervery 4 results , I mean how can I know when user has choose other, with this code I always can choose more than one radio , any help?

                $sql = "SELECT * FROM tbl1 WHERE object = '".$obj."' LIMIT 5 ";
                $result2 = mysqli_query($conn,$sql);

              echo "<form action='' method='post'>";
                  while ($row2 = mysqli_fetch_array($result2,MYSQLI_ASSOC)) {

                    echo "<div align='center'>
                    <table class='demo'  dir='rtl'>
                      <tbody>
                      <tr>
                        <td>".$row2['ojs']."</td>
                        <td> </td>
                      </tr>
                      <tr>
                        <td>".$row2['txt1']."</td>
                        <td><input type='radio' name='chk1' value='1' >
                      </tr>
                      <tr>
                        <td>".$row2['txt2']."</td>
                        <td><input type='radio' name='chk2' value='2' >
                      </tr>
                      <tr>
                        <td>".$row2['txt3']."</td>
                        <td><input type='radio' name='chk3' value='3' >
                      </tr>
                      <tr>
                        <td>".$row2['txt4']."</td>
                        <td><input type='radio' name='chk4' value='4' >
                      </tr>
                      </tbody>
                    </table><br>
                    </div>
                    ";
                  }
                  echo "<input type='submit' name='submit'>
                  </form>";
                  if (isset($_POST['submit'])) {
                    $chk1 = $_POST['chk1'];
                    $chk2 = $_POST['chk2'];
                    $chk3 = $_POST['chk3'];
                    $chk4 = $_POST['chk4'];
                    echo $chk4."|".$chk3."|".$chk2."|".$chk1;

//insert into mysql , just the Selected radio button for each different question
$insQry = "insert into tbl2 (id,sel1,sel2,sel3,sel4) VALUES('$chk1','$chk2','$chk3','$chk4')";
if (mysqli_query($conn, $sql)) {
echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}
                  }

Answer 1

You need to set the name of the entire adio input group to one name. Since you have them set to four different names, it treats them as as four different entities.

Answer 2

You need to give them the same name then get it in PHP like

 $sql = "SELECT * FROM tbl1 WHERE object = '".$obj."' LIMIT 5 ";
            $result2 = mysqli_query($conn,$sql);

          echo "<form action='' method='post'>";
              while ($row2 = mysqli_fetch_array($result2,MYSQLI_ASSOC)) {

                echo "<div align='center'>
                <table class='demo'  dir='rtl'>
                  <tbody>
                  <tr>
                    <td>".$row2['ojs']."</td>
                    <td> </td>
                  </tr>
                  <tr>
                    <td>".$row2['txt1']."</td>
                    <td><input type='radio' name='chk' value='1' >
                  </tr>
                  <tr>
                    <td>".$row2['txt2']."</td>
                    <td><input type='radio' name='chk' value='2' >
                  </tr>
                  <tr>
                    <td>".$row2['txt3']."</td>
                    <td><input type='radio' name='chk' value='3' >
                  </tr>
                  <tr>
                    <td>".$row2['txt4']."</td>
                    <td><input type='radio' name='chk' value='4' >
                  </tr>
                  </tbody>
                </table><br>
                </div>
                ";
              }
              echo "<input type='submit' name='submit'>
              </form>";
              if (isset($_POST['submit'])) {
                $chk = $_POST['chk'];
                echo $chk;

Then simply set the adjacent one in the database to selected number and others to 0