檢查用戶名的可用性和更新字段，也沒有阿賈克斯和jQuery的用戶名

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<?php include('db_connection.php'); 
     error_reporting(E_ALL); 
     session_start(); 
     ?> 
<html> 
<head> 
    <title>Register Form</title> 
    <link rel="STYLESHEET" type="text/css" href="style.css"> 
    <script type="text/javascript"> 
     function validate(form) 
     { 
      var name   = document.register.name.value; 
      var email   = document.register.email.value; 
      var apos   = document.register.email.value.indexOf("@"); 
      var dotpos   = document.register.email.value.lastIndexOf("."); 
      var username  = document.register.username.value; 
      var password  = document.register.password.value; 
      var con_password = document.register.con_password.value; 

      if (name==null || name=="") 
       { 
       alert("Enter The Name"); 
       document.register.name.focus(); 
       return false; 
       } 
      else if (email==null || email=="") 
       { 
       alert("Enter The Email"); 
       document.register.name.focus(); 
       return false; 
       } 
      else if (apos<1 || dotpos-apos<2) 
       { 
       alert("Invalid Email Address!!!") 
       document.register.email.focus(); 
       return false 
       } 
      else if (username==null || username=="") 
       { 
       alert("Enter The User Name"); 
       document.register.username.focus(); 
       return false; 
       } 
      else if (password.length < 6 || password.length > 12) 
       { 
        alert("Password must contain at least 6 less than 12 characters!"); 
        document.register.password.focus(); 
        return false; 
       } 
      else if (con_password.length < 6 || con_password.length > 12) 
       { 
       alert("Password must contain at least 6 less than 12 characters!"); 
       document.register.con_password.focus(); 
       return false; 
       } 
      else if (password != con_password) 
       { 
       alert("You did not enter the same new password twice.Please re-enter your password!"); 
       document.register.con_password.focus(); 
       return false; 
       } 
      else 
       { 
       return true; 
       } 
    } 

    </script> 
</head> 
<body> 
<?php if(isset($_SESSION['session_name1'])) 
     { 
     unset($_SESSION['session_name1']); 
     unset($_SESSION['session_email1']); 
     unset($_SESSION['session_username1']); 
     } 
     if(isset($_GET['action'])) 
     { 
     $action=$_GET['action']; 
     } 
     else 
     { 
     $action = 'add'; 
     } 
     if($action=='edit' && $_GET['id']!="") 
     { 
     $id     = $_GET['id']; 
     $user_edit   = mysql_query("SELECT Name,Email,UserName,Password,Date FROM loginform WHERE UserId='$id'"); 
     $row_edit   = mysql_fetch_array($user_edit); 
     $edit_name   = $row_edit['Name']; 
     $edit_email   = $row_edit['Email']; 
     $edit_username  = $row_edit['UserName']; 
     $edit_password  = $row_edit['Password']; 
     } 
     if(isset($_POST['submit'])) 
     { 
     $name    = $_POST['name']; 
     $email    = $_POST['email']; 
     $username   = $_POST['username']; 
     $password   = $_POST['password']; 
     if($action=='add') 
     { 
      $query   = "SELECT UserName FROM loginform WHERE UserName = '$username'"; 
      $result   = mysql_query($query) or die(); 
      $check_username = mysql_num_rows($result); 
      if($check_username ==0) 
      { 
       mysql_query("insert into loginform (UserId,Name,Email,UserName,Password,Date)Values('','$name','$email','$username','$password',now()) ") or die(mysql_error()); 
       header("Location:Login.php"); 
      } 
      else 
      {?> 
       <center><b><?php echo "Ohhh....User Name Already Taken";?></b></center> 
     <?php } 
     } 
     if($action=='edit') 
     { 
      $query   = "SELECT UserId,UserName FROM loginform WHERE UserName = '$username'"; 
      $result   = mysql_query($query) or die(); 
      $check_username = mysql_num_rows($result); 
      echo "=====>".$check_username; 
      if($check_username ==0) 
      { 
       mysql_query("UPDATE loginform SET Name='$name',Email='$email',UserName='$username',Password='$password' WHERE UserId='$id'") or die(mysql_error()); 
       header("Location:list_view.php"); 
      } 
      else 
      { 
       echo "<b>Ohhh....User Name Already Taken</b>"; 
       //mysql_query("UPDATE loginform SET Name='$name',Email='$email',Password='$password' WHERE UserId='$id'") or die(mysql_error()); 
       //header("Location:list_view.php"); 
      } 
     } 
     } 
?> 

<form name="register" action="" method="post"> 
    <table align="center" border="1" cellpadding="2" cellspacing="1"> 
     <tr> 
      <td colspan="2" align="center"><?php if(!empty($_GET['id'])) { ?><h2>Update Form</h2><?php } else { ?><h2>Register Form</h2><?php }?></td> 
     </tr> 
     <tr> 
      <td>Name:</td> 
      <td><input type="Text" name="name" id="name" value="<?php if($action=='edit') echo $edit_name; ?>"/></td> 
     </tr> 
     <tr> 
      <td>Email:</td> 
      <td><input type="Text" name="email" id="email" value="<?php if($action=='edit') echo $edit_email; ?>"/></td> 
     </tr> 
     <tr> 
      <td>User Name:</td> 
      <td><input type="Text" name="username" id="username" value="<?php if($action=='edit') echo $edit_username; ?>"/></td> 
     </tr> 
     <tr> 
      <td>Password:</td> 
      <td><input type="Password" name="password" id="password" value="<?php if($action=='edit') echo $edit_password; ?>"/></td> 
     </tr> 
     <tr> 
      <td>Confirm Password:</td> 
      <td><input type="Password" name="con_password" id="con_password" value="<?php if($action=='edit') echo $edit_password; ?>"/></td> 
     </tr> 
     <tr> 
      <td colspan="2" align="center"><?php if(!empty($_GET['id'])) { ?> 
      <input type="submit" value="Update" title="Update" name="submit" onclick="return validate(this.form);"/> 
      <?php } else { ?> 
      <input type="submit" name="submit" title="Add" value="Submit" onclick="return validate(this.form);"/> 
      <?php }?> 
      </td> 
     </tr> 
    </table> 
</form> 
<?php ?> 
</body> 
</html>

來源

2011-04-30 Kathiravan

在這裏，當我更新記錄它顯示用戶名已存在，如果我更改用戶名，它會更新我試過但沒有使用任何一個PLZ幫我 – Kathiravan 2011-04-30 04:44:25

編輯問題，請實際提出問題。代碼有什麼問題？ – 2011-04-30 06:43:52

.......................... 戴使用查詢，並得到其是否存在與否，

$username=$_POST['usernaem']; 
$admin_detail=Admincontrollers->getadmindetail($username); 
//ajax file 
//queryy 
select * from table_name where username ='$username'; 
return $result; 

if(isset($result) && count($result)>0) 
echo "var Isexist = 'yes'"; 
else 
echo "var Isexist = 'no'" 
//End of ajax

注：

select * from table_name where username ='$username';

以上查詢是要找到ISEXIST或不關鍵.......... ......

來源

2011-05-06 11:42:42 K6t

檢查用戶名的可用性和更新字段，也沒有阿賈克斯和jQuery的用戶名

回答

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