Question

我有一个html表格：

<tr>
    <td colspan="2">
    Mentees :<br>
    1. Student No: <input name="mentee1" type="text">
    <br>
    2. Student No: <input name="mentee2" type="text">
    <br>
    3. Student No: <input name="mentee3" type="text">
    <br>
    4. Student No: <input name="mentee4" type="text">
    <br>
    5. Student No: <input name="mentee5" type="text">
    <br>
    6. Student No: <input name="mentee6" type="text">
    <br>
    7. Student No: <input name="mentee7" type="text">
    <br>
    8. Student No: <input name="mentee8" type="text">
    <br>
    9. Student No: <input name="mentee9" type="text">
    <br>
    10. Student No: <input name="mentee10" type="text">
    </td>
</tr>

用户可以输入所有或部分受训者并提交。

现在这是我的PHP代码的一部分：（对不起长而凌乱的代码） PHP应该检查发布的$ mentee1-10是否为空或根据它们进行查询，但是我尝试了代码，它似乎只发送$ mentee1并且即使它们不是空的也不用了。

if ($mentor1 != NULL || $mentor1 != "") {
    if ($mentor2 != NULL || $mentor2 != "") {
        if ($mentor3 != NULL || $mentor3 != "") {
            if ($mentor4 != NULL || $mentor4 != "") {
                if ($mentor5 != NULL || $mentor5 != "") {
                    if ($mentor6 != NULL || $mentor6 != "") {
                        if ($mentor7 != NULL || $mentor7 != "") {
                            if ($mentor8 != NULL || $mentor8 != "") {
                                if ($mentor9 != NULL || $mentor9 != "") {
                                    if ($mentor10 != NULL || $mentor10 != "") {
                                        $query_upload3 = "INSERT INTO mentor_student (staff_no, student_no) VALUES ('$staff_no', '$mentee1'),('$staff_no', '$mentee2'),('$staff_no', '$mentee3'),
                                        ('$staff_no', '$mentee4'),('$staff_no', '$mentee5'),('$staff_no', '$mentee6'),('$staff_no', '$mentee7'),('$staff_no', '$mentee8'),
                                        ('$staff_no', '$mentee9'),('$staff_no', '$mentee10')";
                                    }
                                }
                                else {
                                    $query_upload3 = "INSERT INTO mentor_student (staff_no, student_no) VALUES ('$staff_no', '$mentee1'),('$staff_no', '$mentee2'),('$staff_no', '$mentee3'),
                                        ('$staff_no', '$mentee4'),('$staff_no', '$mentee5'),('$staff_no', '$mentee6'),('$staff_no', '$mentee7'),('$staff_no', '$mentee8'),
                                        ('$staff_no', '$mentee9')";
                                }
                            }
                            else {
                                $query_upload3 = "INSERT INTO mentor_student (staff_no, student_no) VALUES ('$staff_no', '$mentee1'),('$staff_no', '$mentee2'),('$staff_no', '$mentee3'),
                                        ('$staff_no', '$mentee4'),('$staff_no', '$mentee5'),('$staff_no', '$mentee6'),('$staff_no', '$mentee7'),('$staff_no', '$mentee8')";
                            }
                        }
                        else {
                            $query_upload3 = "INSERT INTO mentor_student (staff_no, student_no) VALUES ('$staff_no', '$mentee1'),('$staff_no', '$mentee2'),('$staff_no', '$mentee3'),
                                        ('$staff_no', '$mentee4'),('$staff_no', '$mentee5'),('$staff_no', '$mentee6'),('$staff_no', '$mentee7')";
                        }
                    }
                    else {
                        $query_upload3 = "INSERT INTO mentor_student (staff_no, student_no) VALUES ('$staff_no', '$mentee1'),('$staff_no', '$mentee2'),('$staff_no', '$mentee3'),
                                        ('$staff_no', '$mentee4'),('$staff_no', '$mentee5'),('$staff_no', '$mentee6')";
                    }
                }
                else {
                    $query_upload3 = "INSERT INTO mentor_student (staff_no, student_no) VALUES ('$staff_no', '$mentee1'),('$staff_no', '$mentee2'),('$staff_no', '$mentee3'),
                                        ('$staff_no', '$mentee4'),('$staff_no', '$mentee5')";
                }
            }
            else {
                $query_upload3 = "INSERT INTO mentor_student (staff_no, student_no) VALUES ('$staff_no', '$mentee1'),('$staff_no', '$mentee2'),('$staff_no', '$mentee3'),('$staff_no', '$mentee4')";
            }

        }
        else {
            $query_upload3 = "INSERT INTO mentor_student (staff_no, student_no) VALUES ('$staff_no', '$mentee1'),('$staff_no', '$mentee2'),('$staff_no', '$mentee3')";
        }
    }
    else {
        $query_upload3 = "INSERT INTO mentor_student (staff_no, student_no) VALUES ('$staff_no', '$mentee1'),('$staff_no', '$mentee2')";
    }
}
else {
    $query_upload3 = "INSERT INTO mentor_student (staff_no, student_no) VALUES ('$staff_no', '$mentee1')";
}

if (mysqli_query($conn, $query_upload3) == TRUE) {
    echo "<strong>New record created successfully</strong><br>";
    echo "<a href=form_mentor.php>Add New Record</a>";
}

Answer 1

如果我不完全忽略你的观点，那么这样的事情怎么样。你可以通过一些循环来节省很多代码重复：

<tr>
    <td colspan="2">
    Mentees :
    <?php for ($i = 1; $i <= 10; $i++) { ?>
        <br />
        <?php echo $i; ?>. Student No: <input name="mentee[]" type="text">
    <?php } ?>
    </td>
</tr>

<?php
if (isset($_POST['mentee'])) {
    $values = array();
    foreach ($_POST['mentee'] as $mentee) {
        $student_no = mysqli_real_escape_string($mentee);
        $values[] = "('$staff_no', '$student_no')";
    }

    if ($values) {
        $query = "INSERT INTO mentor_student (staff_no, student_no)
                  VALUES " . implode(',',$values);
        if (mysqli_query($conn, $query) == TRUE) {
            echo "<strong>New record created successfully</strong><br>";
            echo "<a href='form_mentor.php'>Add New Record</a>";
        }
    }
}
?>

Answer 2

哇...

让我们看看我是否理解正确。您是否尝试根据发送的值插入值，但它们并不相互依赖？如果是这样的话，我会做这样的事情：

$arr = array();
$str = "";
foreach($_POST as $key => $value) {
      if(isset($value) && strlen($value) > 0) {
           $arr[] = "('$staff_no', ".$key.")";
      }
}
$str = implode(',', $arr);
$query_upload = "INSERT INTO mentor_student (staff_no, student_no) VALUES " . $str;
echo $query_upload;

在这里，我根据用户发送的值动态创建一个数组，然后用逗号加入它们，这样我就可以像你的一样进行查询。

试试吧，你会告诉我们。

Answer 3

你不想在某种情况下做某种情况...... 如果我明白你想做什么，你想要这样的东西：（不是最好的方法，但尝试）：

@IBOutlet weak var mapView: MKMapView!

@IBAction func zoomToUserCurrentLocation(sender: AnyObject) {
    if self.mapView != nil {
        self.mapView.setRegion(MKCoordinateRegionMake(
            self.mapView.userLocation.coordinate, 
            MKCoordinateSpanMake(0.1, 0.1)
        ), animated: true)
    }
}

PHP插入

3 个答案: