php和mysql（登錄表單）

Question

 mysql_connect('localhost','root','' ) or die(mysql_error());

mysql_select_db('user_data') or die(mysql_error());

 //This code runs if the form has been submitted
 if (isset($_POST['submit']))
   {
       //This makes sure they did not leave any fields blank
       if (!$_POST['username'] || !$_post['pass'] || !$_POST['pass2'])

       {
           die("fill all the fields");
       }

       // checks if the username is in use
       if(!get_magic_quotes_gpc())
       {
        $_POST['username']= addslashes($_POST['username']);   
       }
       $usercheck = $_POST['username'];

       $check = mysql_query("SELECT username FROM users WHERE username= '$usercheck'") or die(mysql_error());   

       $check2 = mysql_num_rows($check);

        //if the name exists it gives an error
        if($check2 != 0)
        {
        die('sorry, username '.$_POST['username'].' is already in use');    
        }

        //this makes sure both passwords entered match
        if($_POST['pass'] != $_POST['pass2'])
        {
        die('sorry, passwords did not match.'); 
        }

        // here we encrypt the password and add slashes if needed
        $_POST['pass'] = md5($_POST['pass']);
        if(!get_magic_quotes_gpc())
        {
        $_POST['pass']=addslashes($_POST['pass']);
        $_POST['username']=addslashes($_POST['username']);  
        }

        // now we insert it into the database
        $insert= "INSERT INTO users (username,password) VALUES ('".$_POST['username']."','".$_POST['password']."')";
        $add_member = mysql_query($insert);
?>
 <h1>Registered</h1>

 <p>Thank you, you have registered - you may now login</a>.</p>

 <?php 
  } 
 else 
 {  
 ?>
 <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">

<table border="0">

<tr><td>Username:</td><td>

 </td></tr>

 <tr><td>Password:</td><td>

       <input type="password" name="pass" maxlength="10">

  </td></tr>

   <tr><td>Confirm Password:</td><td>

  <input type="password" name="pass2" maxlength="10">

  </td></tr>

 <tr><th colspan=2><input type="submit" name="submit" 
 value="Register"></th></tr> </table>

  </form>


<?php

}
  ?> 

這是我用於登錄的腳本，但是當我輸入名稱，passwrd並確認密碼時，由於我已經填寫了所有字段，它仍然給我顯示“填寫所有字段”的消息。 任何人都可以幫助我提前感謝

Answer 1

首先嘗試將!$_post['pass']替換為!$_POST['pass']

希望這會有所幫助。

Answer 2

盡管代碼在許多方面都是災難性的，但對您問題的特定答案實際上是使用其他方法來檢查提交的字段。 僅通過否定它們來評估它們還不夠明確。

這樣的事情會是一個更好的開始。

if( !isset( $_POST['username'] ) || !isset( $_POST['pass'] ) || !isset( $_POST['pass2'] ) ){
    die("fill all the fields");
}

這將檢查是否設置了它們。然后，您可以對這些值使用strlen（）或其他內容並強制執行任何所需的規則。