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Email Validation For Form Submission

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This code will demonstrate how to implement the email validation for form submission by using php.
You can obtain a free account at https://www.mailboxvalidator.com/pay/9

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  1. <?php
  2. /********************************************************************************/
  3. /*Description: This code will demonstrate how to implement the email validation for form submission by using php. */
  4. /*              For information, please visit https://www.mailboxvalidator.com/      */
  5. /*******************************************************************************/
  6. /* You can obtain a free account at https://www.mailboxvalidator.com/pay/9 */
  7. ?>
  8.  
  9. <html>
  10.   <head>
  11.   <title>Sign Up Page</title>
  12.   <meta name="viewport" content="width=device-width, initial-scale=1">
  13.   <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
  14.   <link rel="stylesheet" href="css/bootstrap-theme.min.css">
  15.   <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  16.   <link rel="stylesheet" type="text/css" href="login_form.css">
  17.   <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
  18.   <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
  19.   <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  20.   <script src="https://cdnjs.cloudflare.com/ajax/libs/1000hz-bootstrap-validator/0.11.5/validator.min.js"></script>
  21.   <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"></link>
  22. </head>
  23. <body>
  24.     <div class="login">
  25.     <div class="login_container">
  26.     <div class="login_panel panel panel-default">
  27.     <div class="panel-body">
  28.         <h1 id="textHead" class="text-center">Sign Up</h1>
  29.         <hr>
  30.         <form data-toggle="validator" name="login_form" id="textContent" class="form-horizontal" method="post" action="su.php">
  31.             <div class="form-group">
  32.                 <label class="control-label col-sm-3"></label>
  33.                 <div class="col-sm-12">
  34.                     <h4>Email:</h4>
  35.                     <input type="text" data-error="Please enter your email field" class="form-control" name="email" placeholder="Enter email" id="email" required>
  36.                     <!--Check whether the field is empty-->
  37. 		    <div class="help-block with-errors"></div>
  38.                 </div>
  39.             </div>
  40.             <p id="email"></p>
  41.             <div class="form-group">
  42.                 <label class="control-label col-sm-3"></label>
  43.                 <div class="col-sm-12">
  44.                     <h4>Password:</h4>
  45. 		    <!--Set the minimum length of password-->
  46.                     <input type="password" data-error="Please enter minimum of 6 characters." data-minlength="6" class="form-control" name="password" placeholder="Enter password" id="password" required>
  47.                     <!--Check whether the field is empty-->
  48. 		    <div class="help-block with-errors"></div>
  49.                 </div>
  50.             </div>
  51.             <div class="form-group">
  52.                 <label class="control-label col-sm-3"></label>
  53.                 <div class="col-sm-12">
  54.                     <h4>Confirm Password:</h4>
  55.                     <input type="password" data-error="Please reenter password" class="form-control" name="password" placeholder="Enter password" id="password" data-match="#password" data-match-error="Password does not match" required>
  56.                     <!--Check whether the field is empty-->
  57. 		    <div class="help-block with-errors"></div>
  58.                 </div>
  59.             </div>
  60.             <p id="password"></p>
  61.             <div class="form-group">
  62.                 <div class="col-sm-12">
  63.                     <input type="Submit" class="btn btn-block btn-default btn-info" value="Sign Up">
  64.                 </div>
  65.             </div>
  66.         </form>
  67.     </div>
  68.     </div>
  69.     </div>
  70.     </div>
  71. </body>
  72. </html>
  73.  
  74.  
  75. <?php
  76. session_start(); 
  77. $servername = "localhost";
  78. $email = "root";
  79. $password = "";
  80. $database = "";
  81.  
  82. // Create connection to database
  83. $conn = new mysqli($servername, $email, $password,$database);
  84.  
  85. $apiKey = 'Enter your API key';
  86. $query = '';
  87.  
  88. if(!empty($_POST['email']) && !empty($_POST['password']))
  89. {
  90.   $email = $_POST['email'];	
  91.   $pass = $_POST['password'];	
  92.   $params['email']= $email;
  93.  
  94.   //Validate the email through MailboxValidator
  95.   foreach($params as $key=>$value)
  96.   {
  97.     $query .= '&' . $key . '=' . rawurlencode($value);
  98.   }	
  99.   $try = 0;
  100.   do 
  101.   {
  102.     ////////////
  103.     //For https request, please make sure you have enabled php_openssl.dll extension.
  104.     //
  105.     //How to enable https
  106.     //- Uncomment ;extension=php_openssl.dll by removing the semicolon in your php.ini, and restart the apache.
  107.     //
  108.     //In case you have difficulty to modify the php.ini, you can always make the http request instead of https.
  109.     ////////////
  110.  
  111.    $result = file_get_contents('https://api.mailboxvalidator.com/v1/validation/single?key=' . $apiKey . $query);	
  112. 	}while(!$result && $try++ < 3);
  113.  
  114.   $data = json_decode($result);	
  115.  
  116.   //Check if query is success 
  117.   if ($data->is_syntax=='True')
  118.   {
  119.     //Get the data from database 
  120.     $query_email = "SELECT email FROM signup WHERE email='$email'";
  121.     $query_run_email = mysqli_query($conn,$query_email);
  122.  
  123.   //Check the input with database 	
  124.   if (mysqli_num_rows($query_run_email))
  125.   {
  126.     header( "refresh:0; url= signup.php" );
  127.     echo '<script language="javascript">';
  128.     echo 'alert("Email already exists")';
  129.     echo '</script>';
  130.    }
  131.  
  132.    else
  133.    {
  134. 	//Insert data into database 
  135. 	$sql = "INSERT INTO signup(email,password)VALUES ('$email', '$pass')";		
  136. 	mysqli_query($conn, $sql);
  137. 	//The message of account create successful	
  138. 	header( "refresh:0; url= signup.php" );
  139. 	echo '<script language="javascript">';
  140. 	echo 'alert("Account created successful")';
  141. 	echo '</script>';
  142.     }
  143. }
  144.  
  145.   else 
  146.   {
  147. 	//Error message of validation
  148. 	header( "refresh:0; url= signup.php" );
  149. 	echo '<script language="javascript">';
  150. 	echo 'alert("Account created failed, please enter a valid email!")';
  151. 	echo '</script>';
  152.   }
  153. 	/*	if need more information below is the example of error message
  154. 	else if ($data->is_free=='True')
  155. 	{
  156. 	  header( "refresh:0; url= signup.php" );
  157. 	  echo '<script language="javascript">';
  158. 	  echo 'alert("Account created failed, free email are not supported!")';
  159. 	  echo '</script>';
  160. 	}	
  161. 	else if ($data->is_domain=='False')
  162. 	{
  163. 	  header( "refresh:0; url= signup.php" );
  164. 	  echo '<script language="javascript">';
  165. 	  echo 'alert("Account created failed, please make sure your domain name is correct.")';
  166. 	  echo '</script>';
  167. 	}		
  168. 	else if ($data->is_suppressed == 'True')
  169. 	{
  170. 	  header( "refresh:0; url= signup.php" );
  171. 	  echo '<script language="javascript">';
  172. 	  echo 'alert("Account created failed, your email address has been blacklisted!")';
  173. 	  echo '</script>';
  174. 	}		
  175. 	else if ($data->is_verified == 'False')
  176. 	{
  177. 	  header( "refresh:0; url= signup.php" );
  178. 	  echo '<script language="javascript">';
  179. 	  echo 'alert("Account created failed, please enter a verified email!")';
  180. 	  echo '</script>';
  181. 	 }
  182. 	*/
  183.   }		
  184.  
  185. ?>

URL: https://www.mailboxvalidator.com/resources/articles/email-validation-for-form-submission/

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