未捕获错误php和mysql

tsm1rwdh  于 2021-06-25  发布在  Mysql
关注(0)|答案(1)|浏览(282)

这个问题在这里已经有答案了

为什么我不应该在php中使用mysql函数(12个答案)
两年前关门了。

<?php
      session_start();

   $db = mysqli_connect("localhost","root", "", "authentication");

   if (isset($_POST['regbtn'] )) {
    $username = mysql_real_escape_string($_POST['username']);
    $email = mysql_real_escape_string($_POST['email']);
    $password = mysql_real_escape_string($_POST['password']);
    $password2 = mysql_real_escape_string($_POST['password2']);

    if ($password == $password2) {
    $password = md5($password);
    $sql = "INSERT INTO users(username, email, password) 
     VALUES('$usrname','$email','$password')";

     mysqli_query($db, $sql);

     $_SESSION['message']="You are now logged in";
     $_SESSION['username']= $username;
    header("location: home.php");

    }else{

            $_SESSION['message']="The two passwords do not match";

        }

         }

        ?>

      <!DOCTYPE html>
      <html>
         <head>
               <title> Registration</title>
               <link rel="stylesheet" type="text/css" href="style.css">
        </head>
      <body>

            <div class="header">
          <h1> Registration </h1>
      </div>
         <form method="post" action="register.php">
            <table>
              <tr>
                  <td> Username:</td>
                  <td><input type="text" name="username" class="textInput"> 
                </td>
                 </tr>
               <tr>
               <td> Email:</td>
             <td><input type="email" name="email" class="textInput"></td>
             </tr>
             <tr>
                 <td> Password:</td>
             <td><input type="password" name="password" class="textInput"> 
                 </td>
            </tr>
               <tr>
                <td> Confirm Password:</td>
                    <td><input type="password" name="password2" 
         class="textInput"></td>
      </tr>
       <tr>
          <td></td>
        <td><input type="submit" name="regbtn" value="Register"></td>
      </tr>
    </table>

    </form>

     </body>
    </html>

当我试图在xampp上运行它时,他们是这么说的:
致命错误:未捕获错误:调用c:\xampp\htdocs\authentication\register中未定义的函数mysql\u real\u escape\u string()。php:7 stack trace:#0{main}在第7行的c:\xampp\htdocs\authentication\register.php中抛出
因为7号线是: $username = mysql_real_escape_string($_POST['username']); 我想知道这里出了什么问题,我怎样才能找到解决这个问题的办法。谢谢您。

xlpyo6sf

xlpyo6sf1#

mysql从5.5开始就被弃用了:
自从php5.5以来,mysql扩展一直被弃用。应该改用mysqli或pdo扩展。在mysql\u deprevation中已经决定了这个决定,在这里可以找到关于这个决定背后原因的讨论。

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