belugasanity

I'm trying to add an email validation into the code so that it pops up with a similar message as the others if you don't use the @ or .com in your email address and it just ignores it and keeps sending the email anyways no matter what i put into the email field. here is the php i have for it i'm sure it's something really simple but i am not as familiar with php as i would like to be... When i try and test this to make sure it works it only gives me the message that my email has been sent and i want it to not send if the email address doesn't have the @ sign or the .com or whatever kind of website it's from. I bolded the code that is not working the way i want it too. <?php if ($_POST['submit']) { if ($name != '' && $email != '') { if ($human == '4') { if (mail ($to, $subject, $body, $from)) { echo '<p>Your message has been sent!</p>'; } else { echo '<p>Something went wrong, go back and try again!</p>'; } } else if ($_POST['submit'] && $human != '4') { echo '<p>You answered the anti-spam question incorrectly!</p>'; } if (preg_match('/([\w\-]+\@[\w\-]+\.[\w\-]+)/', $email)) { echo '<p>Invalid email address</p>'; } } else { echo '<p>You need to fill in all required fields!!</p>'; } } ?>