PHP bindings for libspf2 (http://www.libspf2.org)
Make sure you install libspf2 development package first.
$ git clone http://github.com/clone_url/php-spf.git
$ cd php-spf
$ phpize
$ ./configure
$ make
$ sudo make install
$ echo "extension=spf.so" > /etc/php5/conf.d/spf.ini
void Spf::__construct([int $type[, string $domain[, string $spf]]])
SpfResponse Spf::query(string $ip, string $helo, string $sender[, string $recipient])
string SpfResponse::getResult();
string SpfResponse::getHeaderComment();
string SpfResponse::getReceivedSpf();
string SpfResponse::getReceivedSpfValue();
string SpfResponse::getExplanation();
string SpfResponse::getSmtpComment();
boolean SpfResponse::hasErrors();
boolean SpfResponse::hasWarnings();
array SpfResponse::getErrors();
array SpfResponse::getWarnings();
<?php
$spf = new Spf();
$response = $spf->query("216.239.32.2", "gmail.com", "[email protected]");
var_dump($response->getResult());
?>