How to do email address validation in PHP?

Question

virtualmisc 0 Junior Poster in Training

14 Years Ago

Hi friends

I have a site made in PHP
Can someone please help with Email address validation?

Thanks

php

5 Contributors
5 Replies
184 Views
22 Hours Discussion Span
Latest Post 14 Years Ago Latest Post by muralibobby2015

edwinhermann 57 Junior Poster

14 Years Ago

function validate_email($email)
{
    if (strlen($email) < 3) {
        return false;
    }
    if (!preg_match('/^[_A-z0-9-]+((\.|\+)[_A-z0-9-]+)*@[A-z0-9-]+(\.[A-z0-9-]+)*(\.[A-z]{2,4})$/',$email)) {
        return false;
    } else {
        return $email;
    }
}

This code is close, but does not allow addresses ending in .museum or .travel.

That's because the code limits the TLD to have between 2 and 4 characters. I would suggest relaxing the rules a little and not impose an upper limit (i.e. only a minimum of 2 characters). Thus line 6 ought to be:

if (!preg_match('/^[_A-z0-9-]+((\.|\+)[_A-z0-9-]+)*@[A-z0-9-]+(\.[A-z0-9-]+)*(\.[A-z]{2,})$/',$email)) {

Edited 14 Years Ago by edwinhermann because: n/a

rajabhaskar525 1 Junior Poster

14 Years Ago

try below code

<script language="javascript">
function functionname()
{
 var emailFormat = /^\w(\.?[\w-])*@\w(\.?[\w-])*\.[a-zA-Z]{2,6}(\.[a-zA-Z]{2})?$/i;
var email=document.formname.emailfieldname.value;
if(email=="")
	{
	alert("Please Enter The Email Id");
	document.formname.emailfieldname.focus();
	return false;
	}
if(email!= "")
		{	
		 	var eres=email.search(emailFormat);
			if(eres == -1)
			{
				alert("Please Enter Valid Email Id ");
				window.document.formname.emailfieldname.focus();
				return false;
			}
		} 
else
{
return true;
}
}

Edited 14 Years Ago by rajabhaskar525 because: n/a

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ElegantElephant 0 Light Poster · Answer 1 · 2010-02-16T01:52:15+00:00

function validate_email($email)
{
    if (strlen($email) < 3) {
        return false;
    }
    if (!preg_match('/^[_A-z0-9-]+((\.|\+)[_A-z0-9-]+)*@[A-z0-9-]+(\.[A-z0-9-]+)*(\.[A-z]{2,4})$/',
        $email)) {
        return false;
    } else {
        return $email;
    }
}

ElegantElephant 0 Light Poster · Answer 2 · 2010-02-16T16:00:11+00:00

This code is close, but does not allow addresses ending in .museum or .travel.
That's because the code limits the TLD to have between 2 and 4 characters. I would suggest relaxing the rules a little and not impose an upper limit (i.e. only a minimum of 2 characters). Thus line 6 ought to be:
if (!preg_match('/^[_A-z0-9-]+((\.|\+)[_A-z0-9-]+)*@[A-z0-9-]+(\.[A-z0-9-]+)*(\.[A-z]{2,})$/',$email)) {

Good point, forgot about those tlds

muralibobby2015 17 Posting Pro · Answer 3 · 2010-02-16T18:23:59+00:00

Hi friends

I have a site made in PHP
Can someone please help with Email address validation?

Thanks

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
<script type="text/javascript">



var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i

function checkmail(e){
var returnval=emailfilter.test(e.value)
if (returnval==false){
alert("Please enter a valid email address.")
e.select()
}
return returnval
}

</script>


</head>

<body>
<form>
<input name="myemail" type="text" style="width: 270px"> <input type="submit" onClick="return checkmail(this.form.myemail)" value="Submit" />

</form>
</body>
</html>