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Mini Shell
Mini Shell
<?php
/*
* This file is part of Referral Spam Detect.
*
* (c) Mark Beech <m@rkbee.ch>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace Jaybizzle\ReferralSpamDetect;
use Jaybizzle\ReferralSpamDetect\Fixtures\Headers;
use Jaybizzle\ReferralSpamDetect\Fixtures\SpamReferrers;
class ReferralSpamDetect
{
/**
* The referring URL.
*
* @var null
*/
protected $referrer = null;
/**
* Headers that contain a referring URL.
*
* @var array
*/
protected $httpHeaders = array();
/**
* Crawlers object.
*
* @var \Jaybizzle\ReferralSpamDetect\Fixtures\SpamReferrers
*/
protected $SpamReferrers;
/**
* Headers object.
*
* @var \Jaybizzle\ReferralSpamDetect\Fixtures\Headers
*/
protected $referrerHeaders;
/**
* The compile string of all referrers.
*
* @var string
*/
protected $compiledString;
/**
* Class constructor.
*/
public function __construct(array $headers = null, $referrer = null)
{
$this->SpamReferrers = new SpamReferrers();
$this->referrerHeaders = new Headers();
$this->compiledString = implode(' ', $this->SpamReferrers->getAll());
$this->setHttpHeaders($headers);
$this->referrer = $this->setReferrer($referrer);
}
/**
* Set HTTP headers.
*
* @param array|null $httpHeaders
*/
public function setHttpHeaders($httpHeaders)
{
// Use global _SERVER if $httpHeaders aren't defined.
if (! is_array($httpHeaders) || ! count($httpHeaders)) {
$httpHeaders = $_SERVER;
}
// Clear existing headers.
$this->httpHeaders = array();
// Only save HTTP headers. In PHP land, that means
// only _SERVER vars that start with HTTP_.
foreach ($httpHeaders as $key => $value) {
if (strpos($key, 'HTTP_') === 0) {
$this->httpHeaders[$key] = $value;
}
}
}
/**
* Return user referrer headers.
*
* @return array
*/
public function getreferrerHeaders()
{
return $this->referrerHeaders->getAll();
}
/**
* Set the referring URL.
*
* @param string $referrer
*/
public function setReferrer($referrer)
{
if (is_null($referrer)) {
foreach ($this->getreferrerHeaders() as $altHeader) {
if (isset($this->httpHeaders[$altHeader])) {
$referrer .= $this->httpHeaders[$altHeader].' ';
}
}
}
return $referrer;
}
/**
* Check referring URL against known spam URLs.
*
* @param string|null $referrer
*
* @return bool
*/
public function isReferralSpam($referrer = null)
{
$referrer = $referrer ?: $this->referrer;
if (strlen(trim($referrer)) == 0) {
return false;
}
return strpos($this->compiledString, $referrer) !== true;
}
}
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