PHP FILTER_VALIDATE_EMAIL在不同的计算机上返回不同的值

Question

I tested form validators for email field and inputted long email:

 $email = 'dfgjfdjglkdfjglkjdfgldfjglkdfjgkldfjlkgjdlkfjglkdfjkgdklfjgldkfjgldlfjg[e-mail]';

On the local machine function filter_var return string with email:

 $email = 'dfgjfdjglkdfjglkjdfgldfjglkdfjgkldfjlkgjdlkfjglkdfjkgdklfjgldkfjgldlfjg[e-mail]';

 die(var_dump(filter_var($email, FILTER_VALIDATE_EMAIL)));

But on the remote server this code returns FALSE.

PHP version on local machine - 5.3.2-1ubuntu4.22

On the remote machine - 5.3.28

Has filter_var function been changed between this version of PHP? Why I receive different values with the same code?

Answer 1

FILTER_VALIDATE_EMAIL has been updated a couple of times since 5.3.2 (you really should update your version BTW). The most notable update was this bug-fix causing a seg-fault when the input/address-to-validate was too long.
Along side this fix (which is logged twice), Rasmus Lerdof on FILTER_VALIDATE_EMAIL returning false positives. Though, AFAIKT, this is not likely to be the cause of your woes.
A couple of other changes include bugs involving special chars like ?, >1 and =.
Anyway, to see all the changes since PHP5.3.2, just check the changelog on their website...

Again: update your local version, it's getting rather dated. Given that you're running ubuntu:

$ sudo apt-get install php5-dev
//optionally
$ sudo apt-get install php5-dev --install-suggests

If you're running mint:

$ sudo apt-get install php5-dev --install-recommends --install suggests

on both distro's, preferably run sudo apt-get update first, of course...