输入留空时phpmyadmin不使用默认值

Question

我有这个问题，如果我将“标题”的输入留空，那么在发送到数据库时它不会设置默认值:“无标题”。我已经在线查看并确保我在 phpmyadmin 中的设置是正确的，但它仍然不会设置默认值。任何建议都将不胜感激!

这是我对“标题”列的 PHPmyadmin 设置:

这些是我的文件:

添加艺术.php

<form method="post" action="addtodb.php">

  <label for="Title">
     <h4>Title</h4>
  </label>

  <input class="u-full-width" 
         type="text" 
         placeholder="Title of art" 
         id="Title"
         name="Title">

</form>

addtodb.php

<?php

if($_SERVER['REQUEST_METHOD'] == "POST") {

$host = 'localhost';
$user = 'root';
$pass = '';
$db = 'testdb';

$dbConnection = new mysqli($host, $user, $pass, $db);

if (mysqli_connect_errno()) {
    printf("Could not connect to the mySQL database: %s\n", mysqli_connect_error());
    exit();
}

if($_POST) {

    $artwork = $_POST["Artwork"];
    $medium = $_POST["Medium"];
    $artist = $_POST["Artist"];
    $title = $_POST["Title"];

    $results = $dbConnection->query("INSERT INTO art 
                                   (Artwork, Title, Artist, Medium) VALUES      
                               ('$artwork','$title','$artist','$medium');");

    if (!$results) {
        echo 'Unable to insert into database.';
        exit();
    } else {
        echo 'Successfully added!';
    }

    mysqli_close($dbConnection);
    header("Location: galleryonly.php"); /* Redirect browser */
    exit();
}
?>

Answer 1

$artwork = $_POST["Artwork"];
$medium = $_POST["Medium"];
$artist = $_POST["Artist"];
$title = $_POST["Title"];

if(!empty($title)) {
   $sql = "INSERT INTO art (Artwork, Title, Artist, Medium) VALUES ('$artwork', '$title', '$artist', '$medium')";
} else {
   $sql = "INSERT INTO art (Artwork, Artist, Medium) VALUES ('$artwork', '$artist', '$medium')";
}

$results = $dbConnection->query($sql);

你可以试试这段代码。

如果您省略该列，将设置默认值。

因为您只有一列具有默认值，所以您可以坚持使用此代码。

如果您有多个默认值的列，则需要根据您的要求进行更改。