自动编号 php 表单字段

我有一个php表单，我可以在其中向mysql数据库添加条目。我正在尝试让 php 表单上的数字字段自动编号。因此，不必为每个条目自己输入数字，它会自动出现在数字字段框中，然后自动递增到下一个条目的下一个数字。我已经将phpmyadmin中的数字字段设置为自动递增。如果有人能告诉我如何编写代码，我将不胜感激。

这是我目前使用的 php 代码和 html。

PHP代码

<html>
<head>
    <title>Add Data</title>
</head>
<body>
<?php
//including the database connection file
include_once("config.php");
if(isset($_POST['Submit'])) {    
    $Number = $_POST['Number'];
    $Link = $_POST['Link'];
    $Article = $_POST['Article'];
    $Date = $_POST['Date'];
    $Name = $_POST['Name'];
    // checking empty fields
    if(empty($Number) || empty($Link) || empty($Article) || empty($Date) || empty($Name)) {
        if(empty($Number)) {
            echo "<font color='red'>Number field is empty.</font><br/>";
        }
        if(empty($Link)) {
            echo "<font color='red'>Link field is empty.</font><br/>";
        }
        if(empty($Article)) {
            echo "<font color='red'>Article field is empty.</font><br/>";
        }
        if(empty($Date)) {
            echo "<font color='red'>Date field is empty.</font><br/>";
        }
        if(empty($Name)) {
            echo "<font color='red'>Name field is empty.</font><br/>";
        }
        //link to the previous page
        echo "<br/><a href='javascript:self.history.back();'>Go Back</a>";
    } else { 
        // if all the fields are filled (not empty) 
        //insert data to database        
        $sql = "INSERT INTO crypto(Number, Link, Article, Date, Name) VALUES(:Number, :Link, :Article, :Date, :Name)";
        $query = $dbConn->prepare($sql);
        $query->bindparam(':Number', $Number);
        $query->bindparam(':Link', $Link);
        $query->bindparam(':Article', $Article);
        $query->bindparam(':Date', $Date);
        $query->bindparam(':Name', $Name);
        $query->execute();
        // Alternative to above bindparam and execute
        // $query->execute(array(':Number' => $Number, ':Date' => $Date, ':Name' => $Name, ':Link' => $Link, ':Article' => $Article));
        //display success message
        echo "<font color='green'>Data added successfully.";
        echo "<br/><a href='index.php'>View Result</a>";
    }
}
?>
</body>
</html>

网页代码

<html>
<head>
    <title>Add Data</title>
  <!-- append ?v=2 to icon url -->
  <link rel="shortcut icon" href="/logo.jpg">
  <link rel="apple-touch-icon" href="/logo.jpg" />
</head>
<body>
    <a href="index.php">Home</a>
    <br/><br/>
    <form action="add.php" method="post" name="form1">
        <table width="25%" border="0">
            <tr> 
                <td>Number</td>
                <td><input type="text" name="Number"></td>
            </tr>
                        <tr> 
                <td>Link</td>
                <td><input type="text" name="Link" style="width: 450px;" /></td>
            </tr>
            <tr> 
                <td>Article</td>
                <td><input type="text" name="Article" style="width: 800px;" /></td>
            </tr>
            <tr> 
                <td>Date</td>
                <td><input type="text" name="Date"></td>
            </tr>
            <tr> 
                <td>Name</td>
                <td><input type="text" name="Name"></td>
                        </tr>
            <tr> 
                <td></td>
                <td><input type="submit" name="Submit" value="Add"></td>
            </tr>
        </table>
    </form>
</body>
</html>

您没有自动递增的主键，您可以创建一个(或直接在创建表中创建(

ALTER TABLE crypto CHANGE Number Number INT(10) AUTO_INCREMENT PRIMARY KEY;

然后你插入不需要此列(因为是自动管理的(而只是

$sql = "INSERT INTO crypto(Link, Article, Date, Name) 
              VALUES(:Link, :Article, :Date, :Name)";

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