How to validate multiple Email ID from Textarea input

To validate Email ID is quite common but when it comes to validate a multiple email Id from textarea input then you will be facing many bugs. I Have solved this issue in my task and i hope
it will be useful for you..
client may ask to enter the Email Id in this format:

ex1:(To type in horizontal wise)

test@sdf.com,rest@test.com,rest@sdf.com

ex2:(To type in vertical order)

test@fest.com

rest@test.com

test@west.com

For this output we can use javascript or PHP coding. so i have used Php coding for this one,lets see how can we extract the result by separating comma’s and enter carraige.

Code:

//To explode the submitted value when you press Enter button

$arrLines = explode(”\n”,$_POST['email']);

//Separated values are stored in $value

foreach($arrLines as $key=>$value){

//Now we are Looking for comma operator , if they have specified in field

$arrEmail = explode(”,”,$value);

//Separated values are stored in $value1

foreach($arrEmail as $key1=>$value1){

//Here i am checking whether the user as entered any Null values

if(trim($value1)!=”){

//Regular Expression used to check the Email is valid or Not

if(!eregi(’^[a-zA-Z0-9._-]+@[a-zA-Z0-9-]+\.[a-zA-Z]{2,4}(\.[a-zA-Z]{2,3})?(\.[a-zA-Z]{2,3})?$’, trim($value1))){

//Assigning invalid email Id to varaible

$invalidemailId = trim($invalidemailId.$value1).”<br>”;

//Printing the email Id which is Not Valid.

$erroremail=’Mail as Not Sent For Following Email ID,Please Enter Valid Email ID<br> ‘.$invalidemailId;

}

//To send the mail to list

else{

$from=’inforeply@bharat.com’;

$to = $value1;

$subject = ‘Birthday Reminders for August’;

$message =file_get_contents(’mailers/bmp-mailer.html’);

$headers = ‘MIME-Version: 1.0′ . “\r\n”;

$headers .= ‘Content-type: text/html; charset=iso-8859-1′ . “\r\n”;

$headers .= ‘From:’ .$from . “\r\n”;

mail($to, $subject, $message, $headers);

}

}