如何修复发送到MySQL的查询？PHP中的错误

我已经设置了代码和数据库查询。我认为PDO连接到MySQL的一切都是正确的，但是记录没有进入数据库

//包括开始 //联系

<?php   
    $DSN = 'mysql:host = localhost; dbname = cms4.2.1';
    $ConnectingDB = new PDO($DSN, 'root', '');
?>

//重定向功能

<?php
    function Redirect_to($New_Location) {
            header("Location:".$New_Location);
        exit;
    }
?>

//错误处理

<?php
    session_start();

    function ErrorMessage(){
        if (isset($_SESSION["ErrorMessage"])){
            $Output = "<div class=\"alert alert-danger\">";
            $Output .= htmlentities($_SESSION["ErrorMessage"]);
            $Output .= "</div>";
            $_SESSION["ErrorMessage"] = null;
            return $Output;
        }
    }

    function SuccessMessage() {
        if (isset($_SESSION["SuccessMessage"])) {
            $Output = "<div class=\"alert alert-success\">";
            $Output .= htmlentities($_SESSION["SuccessMessage"]);
            $Output .= "</div>";
            $_SESSION["SuccessMessage"] = null;
            return $Output;
        }
    }
?>

//包括结束

//代码

<?php require_once("Includes/DB.php"); ?>
<?php require_once("Includes/Functions.php"); ?>
<?php require_once("Includes/Sessions.php"); ?>

<?php
   if (isset($_POST["Submit"])) {
      $Category = $_POST["CategoryTitle"];
      $Admin = "Abdullah";
     date_default_timezone_set("Asia/Riyadh");
     $CurrentTime = time();
     $DateTime = strftime("%B-%d-%Y %H:%M:%S", $CurrentTime);
     if (empty($Category)) {
        $_SESSION["ErrorMessage"] = "All fields must be filled out";
        Redirect_to("Categories.php");
     } else if (strlen($Category) < 3) {
        $_SESSION["ErrorMessage"] = "Category is short";
        Redirect_to("Categories.php");
     } else if (strlen($Category) > 49) {
        $_SESSION["ErrorMessage"] = "Category is too long";
        Redirect_to("Categories.php");
     } else {
       // Insert to database
       // The problem starts here I think
       global $ConnectingDB;
       $sql = "INSERT INTO category(title,author,datetime)";
       $sql .= "VALUES(:categoryName,:adminName,:dateTime)";
       $stmt = $ConnectingDB->prepare($sql);
       $stmt -> bindValue(':categoryName',$Category);
       $stmt -> bindValue(':adminName',$Admin);
       $stmt -> bindValue(':dateTime',$DateTime);
       $Execute = $stmt -> execute();

       if ($Execute) {
       $_SESSION["SuccessMessage"] = "Category Added Successfully";
          Redirect_to("Categories.php");
       } else {
          $_SESSION["ErrorMessage"] = "Something went wrong";
          Redirect_to("Categories.php");
       }
   }
}
?>

execute消息始终保留“出错”

当我使用普通的MySQL查询系统时，一切都正常。但我想完成我在PDO上的工作

我想你可以用

然后，您将能够打印错误和异常

try{
   $stmt = $ConnectingDB->prepare($sql);
   $stmt -> bindValue(':categoryName',$Category);
   $stmt -> bindValue(':adminName',$Admin);
   $stmt -> bindValue(':dateTime',$DateTime);
   $Execute = $stmt -> execute();
}catch( PDOException $e ) {
  print $e->getMessage();
}

---

希望能对您有所帮助。

尝试在第一行的值之前或结束括号之后插入空格，就像我在下面所做的那样，有时由于编写的语法错误，查询无法工作

 $sql = "INSERT INTO category(title,author,datetime) ";

或

---

这可能不是问题，但这是一个很好的做法。

然后打印出PDO的errorInfo表中的数据类型是什么

datetime

？@kuh chan我尝试了errorInfo，得到了这个数组：array（[0]=>00000[1]=>[2]=>）@Cid它是VARCHAR 50这是一个注释而不是答案。如果你需要澄清的话，试着获得你需要评论的几个声望点。这不是问题，因为他用括号来定义字段。

$sql .= " VALUES(:categoryName,:adminName,:dateTime)";