This is a simple email address validation function written in PHP.It can be used in signup forms to validate email entries on form.Email address validation function will return 1 if it is valid and 0 if it is not.

function check_email($str)
{
//returns 1 if valid email, 0 if not
if(ereg(”^.+@.+\\..+$”, $str))
return 1;
else
return 0;
}