Question

我收到致命错误“未捕获异常'PDOException'，消息'SQLSTATE [23000]：完整性约束违规：1048列'名称'不能为空'在C：\ Users \ Aushkia \ Desktop \ PHP Class \ new.php：20堆栈跟踪：＃0 C：\ Users \ Aushkia \ Desktop \ PHP Class \ new.php（20）：PDOStatement-＆gt;执行（数组）＃1 {main}抛出C：\ Users \ Aushkia \ Desktop \ PHP Class \ new.php on line 20“

并且它也说我的第5-7行的索引是Undefined Index。

这是我这个课程的最后一个项目，我似乎无法找到如何解决这个问题，我查找的所有内容都是针对其他python或java的。为了我的宝宝出生，我必须在一个半小时内去医院！大声笑。无论如何，这是我的代码，任何帮助都会很棒，提前谢谢!!

<?php
session_start();

 /* Data input */
$Name = $_POST['Name'];
$Description = $_POST['Description'];
$Price = $_POST['Price'];


/* login section */

require("auth.php");

/* sql input  */

$db = new PDO( "mysql:host=localhost;dbname=php", "admin", "123" );
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );

$stmnt = $db->prepare( "insert into products (name, description, price)values(:name, :description, :price)" );
$stmnt->execute( array( 'name' => $Name, 'description' => $Description, 'price' => $Price ));


$results = $db->query( 'select * from products' ); 

$products = $results->fetchAll();   


?>
<!DOCTYPE HTML>
<!--  UPDATED TO AUTHENTIACTION -->
<html>

<head>
<meta charset="utf-8">
<title>new item</title>
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" href="stl.css" type="text/css" media="screen" charset="utf-8"> 
</head> 
<p>
<a href="show.php" class="button">Home</a>
<a href="new.php" class="button">Add New</a>
<a href="login.view.php" class="button">Login</a>
<a href="logout.php" class="button">Logout</a>
</P>
<body>


<div align="Center">

<h1>item info</h1><hr/>



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


<label for="name">Name:</label><br />
<input name="name" type="text" placeholder="Name" value="" id="Name">
<br />

<label for="desciption">Description :</label><br />
<input name="desciption" type="text" placeholder="Description" value="" id="Description">
<br />

<label for="price">Price :</label><br />
<input name="price" type="text" placeholder="Price" value="" id="Price">
<br />



<p><input type="submit" value="save"></p>

</form>


</div>
</body>
</html>

Answer 1

你必须学会调试自己的代码，你得到的错误和通知是自我解释的，正如他们在评论中所说的那样。

首先是未定义的索引通知

未定义的索引表示在数组中找不到该条目。在你的情况，$ _POST ['姓名']，$ _POST ['描述']; $ _ POST [ '价格'] 在$ _POST数组中不存在。

在表单中

，您没有具有上述名称属性的输入类型。注意：名称和名称，价格和价格，描述和描述之间存在细微差别。

您在pdo上遇到致命错误，因为您在必须为非null的列上插入空值。你的错误的基础来自上面的解释，

PDO使用带有占位符的预准备语句，如：

:placeholdername,:placeholdername2

执行它们时，您可以按原样编写占位符

execute(array(':placeholdername'=>$identifiers,':placeholdername2'=>identifier2)

在您的情况下，这些$stmnt->execute( array( 'name' => $Name, 'description' => $Description, 'price' => $Price ));不存在。

或者您使用“？”作为占位符：

你的代码应该是

<?php
session_start();
/* login section */

require("auth.php");

/* sql input  */

$db = new PDO("mysql:host=localhost;dbname=php", "admin", "123");
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$errors = "";

if (isset($_POST['btnName'])) {

    //check if inputs are not empty

    if (empty($_POST['name'])) {

        echo "enter name";
        $errors++;
    } else {

        $Name = $_POST['name'];
    }

    if (empty($_POST['desciption'])) {

        echo "enter desciption";
        $errors++;
    } else {

        $Description = $_POST['desciption'];
    }

    if (empty($_POST['price'])) {

        echo "enter price";
        $errors++;
    } else {

        $Price = $_POST['price'];
    }


    if ($errors <= 0) {
        //No errors insert

       try {

             $stmnt = $db->prepare("insert into products (name, description, price)values(:name, :description, :price)");
        $stmnt->execute(array(
            ':name' => $Name,
            ':description' => $Description,
            ':price' => $Price
        ));

        echo "records added";

       } catch (PDOException $e) {


            echo "error : ".$e->getMessage();

       }



    }


}
?>



<!DOCTYPE HTML>
<!--  UPDATED TO AUTHENTIACTION -->
<html>

<head>
<meta charset="utf-8">
<title>new item</title>
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" href="stl.css" type="text/css" media="screen" charset="utf-8"> 
</head> 
<p>
<a href="show.php" class="button">Home</a>
<a href="new.php" class="button">Add New</a>
<a href="login.view.php" class="button">Login</a>
<a href="logout.php" class="button">Logout</a>
</P>
<body>


<div align="Center">

<h1>item info</h1><hr/>



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


<label for="name">Name:</label><br />
<input name="name" type="text" placeholder="Name" value="" id="Name">
<br />

<label for="desciption">Description :</label><br />
<input name="desciption" type="text" placeholder="Description" value="" id="Description">
<br />

<label for="price">Price :</label><br />
<input name="price" type="text" placeholder="Price" value="" id="Price">
<br />

<p><input type="submit" value="save" name="btnName"></p>

</form>


</div>
</body>
</html>

或“？”占位符

<?php session_start(); /* login section */ require("auth.php"); /* sql input */ $db = new PDO("mysql:host=localhost;dbname=php", "admin", "123"); $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $errors = ""; if (isset($_POST['btnName'])) { //check if inputs are not empty if (empty($_POST['name'])) { echo "enter name"; $errors++; } else { $Name = $_POST['name']; } if (empty($_POST['desciption'])) { echo "enter desciption"; $errors++; } else { $Description = $_POST['desciption']; } if (empty($_POST['price'])) { echo "enter price"; $errors++; } else { $Price = $_POST['price']; } if ($errors <= 0) { //No errors insert try { $stmnt = $db->prepare("insert into products (name, description, price)values(?,?,?)"); $stmnt->execute(array($Name,$Description,$Price)); echo "records added"; } catch (PDOException $e) { echo "error : ".$e->getMessage(); } } } ?>

注意：为了您自己的利益，最好过滤和清理来自的输入用户之前你可以保存它

如何保存用户输入到mySQL，得到FATAL ERROR（php）

1 个答案: