NYCPHP Meetup

[matthijs abeelen]

This problem is spreading very fast, a good summery of the best solution(s) 
is needed indeed. Unfortunately, I'm not the one who can do that. Waiting 
eagerly for the article on Phundamentals!

"We're working on getting a Phundamentals article online covering the
discussion over the last couple of days.  Thanks Roland and everyone for
their feedback and discussion."


At the moment I'm using the following script:
<?php
// http://www.codingforums.com/showthread.php?t=67546

function email_injection_filter($formInput) 
{ 
$injectionStrings = array("apparently-to", 
"bcc", 
"boundary=", 
"charset", 
"content-disposition", 
"content-type", 
"content-transfer-encoding", 
"errors-to", 
"in-reply-to", 
"message-id", 
"mime-version", 
"multipart/mixed", 
"multipart/alternative", 
"multipart/related", 
"reply-to", 
"x-mailer", 
"x-sender", 
"x-uidl" 
); 
foreach ($injectionStrings as $spam) 
{ 
$pos = strpos(strtolower($formInput), $spam); 
if ($pos !== false) 
{ 
error_log("Email injection attempt - From IP: " . $_SERVER['REMOTE_ADDR'] . 
" | Server Time: " . date('m\/d\/y, h:i:s A'), 1, "mymail at domain.com"); 

exit("<html><body><p>Error message here.</p></body></html>"); 

} 
} 
}
?>

And then after receiving the POST variables I'll do:
foreach ($_POST as $formInput)
{
email_injection_filter($formInput);
}

Could anyone give some feedback on this particular script? I know there have 
been given/proposed many filters already. But the sheer amount of them is a 
bit overwhelming and it seems there's still no consensus on the best 
solution.

Thanks,
Matthijs
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