如何处理SQLSTATE [23000]：完整性约束违规：1062

Question

一切工作在我的代码但是如果你要创建一个用户它将接受，即使你使用相同的电子邮件创建一个多用户我已经尝试搜索一些解决方案并把它放在我的代码中，但我仍然无法使它工作，我怎样才能使SQLSTATE [23000]：完整性约束违规：1062变成“错误电子邮件已存在”？可能吗？

addform.php

，我也想，如果有重复的

<style type="text/css"> 
#dis{ 
display:none; 
} 
</style> 




<div id="dis"> 
<!-- here message will be displayed --> 
</div> 


<form method='post' id='emp-SaveForm' action="#"> 

<table class='table table-bordered'> 

    <tr> 
     <td>First Name</td> 
     <td><input type='text' name='fname' class='form-control' required /></td> 
    </tr> 

    <tr> 
     <td>Last Name</td> 
     <td><input type='text' name='lname' class='form-control' required></td> 
    </tr> 

    <tr> 
     <td>Contact Number</td> 
     <td><input type='number' name='contactnum' class='form-control' required></td> 
    </tr> 

    <tr> 
     <td>Email</td> 
     <td><input type='email' name='email' class='form-control' required /></td> 
    </tr> 

    <tr> 
     <td>Password</td> 
     <td><input type="password" name='pass' class='form-control' required /></td> 
    </tr> 

    <tr> 
     <td>Language</td> 
     <td><input type='text' name='lang' class='form-control' required /></td> 
    </tr> 
    <tr> 
     <td colspan="2"> 
     <button type="submit" class="btn btn-primary" name="btn-save" id="btn-save"> 
     <span class="glyphicon glyphicon-plus"></span> Save this User 
     </button> 
     </td> 
    </tr> 

</table> 

create.php

<?php 
require_once 'dbconfig.php'; 


if($_POST) 
{ 
    $fname = $_POST['fname']; 
    $lname = $_POST['lname']; 
    $contactnum = $_POST['contactnum']; 
    $email = $_POST['email']; 
    $pass = $_POST['pass']; 
    $lang = $_POST['lang']; 
    try{ 

     $stmt = $db_con->prepare("INSERT INTO tbluser(fname,lname,contactnum,email,pass,lang) VALUES(:ufname,:ulname,:ucontact,:uemail,:upass,:ulang)"); 
     $stmt->bindParam(":ufname", $fname); 
     $stmt->bindParam(":ulname", $lname); 
     $stmt->bindParam(":ucontact", $contactnum); 
     $stmt->bindParam(":uemail", $email); 
     $stmt->bindParam(":upass", $pass); 
     $stmt->bindParam(":ulang", $lang); 
     if($stmt->execute()) 
     { 
      echo "Successfully Added"; 
     } 
     else{ 
      echo "Query Problem"; 
     } 
    } 
    catch(PDOException $e){ 
     echo $e->getMessage(); 
    } 
} 

?> 

我只是显示一个错误信息新的PHP我在数据库中使用PDO不知道它是否是一件好事，无论如何感谢帮助和帮助ase让我知道，如果我可以使用或只是复制粘贴你的代码或不:)

Answer 1

你应该编辑你的create.php并添加电子邮件检查代码数据库，请检查以下代码，以获得更多的想法。

<?php 
require_once 'dbconfig.php'; 


if ($_POST) { 

    $fname = $_POST['fname']; 
    $lname = $_POST['lname']; 
    $contactnum = $_POST['contactnum']; 
    $email = $_POST['email']; 
    $pass = $_POST['pass']; 
    $lang = $_POST['lang']; 

    // it's good habit to validate email address always 
    // i checked here it should not be blank 
    if ($email != '') { 

     // check in database email address is already taken 
     $sel = $db_con->prepare("select email from tbluser where email = :email"); 
     $sel->execute(array(':email' => $email)); 
     $row = $sel->fetch(); 

     // if you found any row with current entered email then send it to else 
     if ($sel->fetchColumn() == 0) { 
      try{ 
       $stmt = $db_con->prepare("INSERT INTO tbluser(fname,lname,contactnum,email,pass,lang) VALUES(:ufname,:ulname,:ucontact,:uemail,:upass,:ulang)"); 
       $stmt->bindParam(":ufname", $fname); 
       $stmt->bindParam(":ulname", $lname); 
       $stmt->bindParam(":ucontact", $contactnum); 
       $stmt->bindParam(":uemail", $email); 
       $stmt->bindParam(":upass", $pass); 
       $stmt->bindParam(":ulang", $lang); 
       if($stmt->execute()) 
       { 
        echo "Successfully Added"; 
       } 
       else{ 
        echo "Query Problem"; 
       } 
      } 
      catch(PDOException $e){ 
       echo $e->getMessage(); 
      } 
     } else { 
      echo $email . ' already taken, try other email address'; 
     } 
    } else { 
     echo 'Email address is blank'; 
    } 
} 

?> 

Answer 2

您需要设置PDO错误模式。例如：

/* @var $dbConn PDO */ 
$dbConn = new PDO("mysql:host=$dbHost;dbname=$dbName", $dbUsername, $dbPassword); 
/* set the PDO error mode to exception */ 
$dbConn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);