note 16884 deleted from function.mail by jimw
| From: | jimw@php.net | Date: | Tue, 04 Dec 2001 20:31:24 +0000 |
| Subject: | note 16884 deleted from function.mail by jimw | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-21611@lists.php.net to get a copy of this message | ||
Before accepting an e-mail address, you might want to check its formal correctness by using this
regular-expression function:
function is_email($email)
{
$pattern =
"^[-_.[:alnum:]]+@((([[:alnum:]]|[[:alnum:]][[:alnum:]-]*[[:alnum:]])\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$";
if(eregi($pattern, $email))
return(1);
else
return(0);
}
The function returns TRUE if $email is a formally correct e-mail address, FALSE otherwise. Formally
correct means that the address MAY exist -- which of course does not mean it DOES exist. The
function is NewTLD-safe. The minimum/maximum length of domain names is not taken into consideration
since it differs from NIC to NIC.
mail@philipp-louis.de => TRUE
webmaster@php.net => TRUE
billgates@microsoft.com => TRUE
..._-_-@a-----------------b.org => TRUE
grandpa@olddomain.arpa => TRUE
someone@somewhere.museum => TRUE
some.one@123.123.123.123 => TRUE (IP address!)
abc,def@hotmail.com => FALSE (user name may not contain ",")
abc@-domain.de => FALSE (domain name may not begin with "-")
xyz@domain.xy => FALSE ("xy" is not a valid TLD)
admin@69.2.421.99 => FALSE ("69.2.421.99" is not a valid IP address)
...