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<?php |
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/* |
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* This file is part of Crawler Detect - the web crawler detection library. |
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* |
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* (c) Mark Beech <[email protected]> |
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* |
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* This source file is subject to the MIT license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace Jaybizzle\CrawlerDetect\Detectors; |
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use Jaybizzle\CrawlerDetect\Fixtures\Ips; |
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class IpDetector |
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{ |
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public function __construct($userIp) |
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{ |
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$this->userIp = $userIp; |
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} |
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public function check() |
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{ |
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$ips = new Ips(); |
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foreach ($ips->getAll() as $ip) { |
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if ($this->ipInRange($this->userIp, $ip) === true) { |
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return true; |
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} |
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} |
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return false; |
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} |
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public function ipInRange($ip, $range) |
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{ |
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if (strpos($range, '/') !== false) { |
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// $range is in IP/NETMASK format |
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list($range, $netmask) = explode('/', $range, 2); |
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if (strpos($netmask, '.') !== false) { |
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// $netmask is a 255.255.0.0 format |
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$netmask = str_replace('*', '0', $netmask); |
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$netmask_dec = ip2long($netmask); |
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return ((ip2long($ip) & $netmask_dec) == (ip2long($range) & $netmask_dec)); |
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} else { |
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// $netmask is a CIDR size block |
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// fix the range argument |
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$x = explode('.', $range); |
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while (count($x) < 4) { |
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$x[] = '0'; |
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} |
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list($a, $b, $c, $d) = $x; |
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$range = sprintf('%u.%u.%u.%u', empty($a) ? '0' : $a, empty($b) ? '0' : $b, empty($c) ? '0' : $c, empty($d) ? '0' : $d); |
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$range_dec = ip2long($range); |
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$ip_dec = ip2long($ip); |
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// Use math to create create the netmask with 'netmask' 1s and then fill it to 32 with 0s |
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$wildcard_dec = pow(2, (32 - $netmask)) - 1; |
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$netmask_dec = ~$wildcard_dec; |
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return (($ip_dec & $netmask_dec) == ($range_dec & $netmask_dec)); |
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} |
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} else { |
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// range might be 255.255.*.* or 1.2.3.0-1.2.3.255 |
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if (strpos($range, '*') !== false) { // a.b.*.* format |
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// Just convert to A-B format by setting * to 0 for A and 255 for B |
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$lower = str_replace('*', '0', $range); |
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$upper = str_replace('*', '255', $range); |
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$range = "$lower-$upper"; |
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} |
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if (strpos($range, '-') !== false) { // A-B format |
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list($lower, $upper) = explode('-', $range, 2); |
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$lower_dec = (float) sprintf('%u', ip2long($lower)); |
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$upper_dec = (float) sprintf('%u', ip2long($upper)); |
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$ip_dec = (float) sprintf('%u', ip2long($ip)); |
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return (($ip_dec >= $lower_dec) && ($ip_dec <= $upper_dec)); |
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} |
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throw new Exception('Range argument is not in 1.2.3.4/24 or 1.2.3.4/255.255.255.0 format'); |
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} |
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} |
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} |
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JayBizzle /
Crawler-Detect
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In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: