Question

function valid_email($email) { //use regular expression to parse email address $good_email = "([a-zA-Z0-9] @[a-zA-Z0-9_-] \.[a-zA-Z0-9_-] ) "; //added " in beginning of line //for variable i

Asked by: siddharthkool

function valid_email($email) {
   //use regular expression to parse email address
 $good_email = "([a-zA-Z0-9]+@[a-zA-Z0-9_-]+\.[a-zA-Z0-9_-]+)+"; //added " in beginning of line //for variable
 
   if (ereg($good_email, $email)) {  
                                      // i want to :-
       $email = $_POST['email'];  //if Email address is of @xyz domin then only insert into database.
      echo $email." is a valid email address.<br>";
      return true;
   }
   else {
      echo $email." register again.<br>";
      return false;
   }
}


%%**## want to insert email into database only if email is in correct format !!

also i want validation like say only emails from  @hotmail .com  

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Asked On
2009-06-08 at 10:51:21ID24473044
Topics

Web Development Software

,

Web Frameworks

Participating Experts
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Points
500
Comments
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Answers

 

by: cxrPosted on 2009-06-08 at 11:17:14ID: 24574821

The regexp is wrong, it does not accept all valid emails. See my answer in the related question for a better regexp.

>> want to insert email into database only if email is in correct format !!

Then put the INSERT statement within a if statement, like this:

if(valid_email($email)) {
  mysql_query("INSERT INTO ...");  
}

>> also i want validation like say only emails from  @hotmail .com  

Then you need another if condition. You can do like this:

if(valid_email($email)) {
  list($name,$domain) = explode('@',$email);
  if($domain == 'hotmail.com') {
    mysql_query("INSERT INTO ...");  
  }
}

 

by: siddharthkoolPosted on 2009-06-10 at 09:11:06ID: 24593275

i have registration form in which user has to put his ;

email :
name:
phone:
Altphone:
and select courses .

when he clicks submit control is passed to below php form . this has coded to validate each and every field and check if email belongs to spsu.edu domain , and if its of correct format.

and data is inserted in database.

there is some fault  for email , values don't get inserted . if i just do $email=$_post['email'] then data is stored in database , but when i write function valid_email($email) , for checking user input ...i can't store user data into database..

please help!!!   appreciate it !! in Advance..

<?php
 
 //Database Information
$dbhost = "localhost";
$dbname = "reg";
$dbuser = "root";
$dbpass = "";
 
 
$email = $_POST['email'];
   
$name = preg_replace('/[^a-z .-]/i','',$_POST['name']);
 
if($name != $_POST['name'])
  die ("Invalid characters in name...Please Go Back and  Register Again");
 
     $department=preg_replace('/[^a-z .-]/i','',$_POST['department']);
     if($department !=$_POST['department']) 
     die("Invalid characters in department field ....Please Go Back And  Register Again");
      
//$department = $_POST['department'];
 
     $phone = preg_replace('/[^0-9 -]/','',$_POST['phone']);
     if($phone !=$_POST['phone'])
     die("Invalid characters in phone field ....Please Go Back And Register Again") ;
//$phone = $_POST['phone'];
 
$altphone=preg_replace('/[^0-9 -]/','',$_POST['altphone']);
if($altphone !=$_POST['altphone'])
die("Invalid characters in Alternate phone field ....Please Go Back And Register Again") ; 
//$altphone = $_POST['altphone'];
$vista= $_POST['vista'] ;
$wimba= $_POST['wimba'] ;
 
 
 
//Connect to database
 
 
 
          $email = $_POST['email'];
 
 
  function valid_email($email) {
   //use regular expression to parse email address
 $good_email = "([a-zA-Z0-9]+@[a-zA-Z0-9_-]+\.[a-zA-Z0-9_-]+)+"; //added " in beginning of line //for variable
 
   if(valid_email($email)) {
  list($name,$domain) = explode('@',$email);
  if($domain == 'spsu.com') {
    $query = "INSERT INTO details (email,name,department,phone,altphone,vista,wimba,date1)
                     VALUES('$email','$name','$department','$phone','$altphone','$vista','$wimba',CURDATE())";
  }
}
   else {
      echo $email." register again.<br>";
      return false;
   }
}
    
 
 
      mysql_connect ( $dbhost, $dbuser, $dbpass)or die("Could not connect: ".mysql_error());
mysql_select_db($dbname) or die(mysql_error());
 
?>
                                              
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by: cxrPosted on 2009-06-10 at 15:36:23ID: 24597231

You had removed parts of the valid_email() function, I fixed it. I also fixed the regexp. The mysql_query() function call was missing. I moved the mysql_connect() to the start of the script. You should validate the vista & wimba fields. I don't know what is valid for those fields, so I just escaped them to prevent sql injection.

<?php
 
//Database Information
$dbhost = "localhost";
$dbname = "reg";
$dbuser = "root";
$dbpass = "";
 
//Connect to database
mysql_connect($dbhost, $dbuser, $dbpass) or die("Could not connect: ".mysql_error());
mysql_select_db($dbname) or die(mysql_error());
 
function db_escape($value) {
  if(function_exists('get_magic_quotes_gpc') and get_magic_quotes_gpc())
    $value = stripslashes($value);
  return mysql_real_escape_string($value);
}
 
$name = preg_replace('/[^a-z .-]/i','',$_POST['name']);
if($name != $_POST['name'])
  die ("Invalid characters in name...Please Go Back and  Register Again");
 
$department = preg_replace('/[^a-z .-]/i','',$_POST['department']);
if($department != $_POST['department']) 
  die("Invalid characters in department field ....Please Go Back And  Register Again");
 
$phone = preg_replace('/[^0-9 -]/','',$_POST['phone']);
if($phone != $_POST['phone'])
  die("Invalid characters in phone field ....Please Go Back And Register Again") ;
 
$altphone = preg_replace('/[^0-9 -]/','',$_POST['altphone']);
if($altphone != $_POST['altphone'])
  die("Invalid characters in Alternate phone field ....Please Go Back And Register Again") ; 
 
$vista = db_escape($_POST['vista']);  // validation!
$wimba = db_escape($_POST['wimba']);  // validation!
 
function valid_email($email) {
  $good_email = "^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$";
  return eregi($good_email, $email) ? true : false;
}
 
$email = trim($_POST['email']);
if(valid_email($email)) {
  echo $email." is a valid email address.<br>";
  list($name,$domain) = explode('@',$email);
  if($domain == 'spsu.com') {
    $query = "INSERT INTO details (email,name,department,phone,altphone,vista,wimba,date1)
              VALUES('$email','$name','$department','$phone','$altphone','$vista','$wimba',CURDATE())";
    mysql_query($query) or die(mysql_error());
  }
} else
  echo $email." register again.<br>";
 
?>

                                              
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