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<?php |
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/** |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* http://www.gnu.org/copyleft/gpl.html |
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* |
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* @file |
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*/ |
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use IPSet\IPSet; |
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/** |
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* @since 1.28 |
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*/ |
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class ProxyLookup { |
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/** |
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* @var string[] |
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*/ |
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private $proxyServers; |
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/** |
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* @var string[] |
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*/ |
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private $proxyServersComplex; |
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/** |
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* @var IPSet|null |
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*/ |
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private $proxyIPSet; |
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/** |
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* @param string[] $proxyServers Simple list of IPs |
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* @param string[] $proxyServersComplex Complex list of IPs/ranges |
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*/ |
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public function __construct( $proxyServers, $proxyServersComplex ) { |
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$this->proxyServers = $proxyServers; |
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$this->proxyServersComplex = $proxyServersComplex; |
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} |
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/** |
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* Checks if an IP matches a proxy we've configured |
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* |
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* @param string $ip |
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* @return bool |
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*/ |
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public function isConfiguredProxy( $ip ) { |
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// Quick check of known singular proxy servers |
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if ( in_array( $ip, $this->proxyServers ) ) { |
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return true; |
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} |
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// Check against addresses and CIDR nets in the complex list |
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if ( !$this->proxyIPSet ) { |
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$this->proxyIPSet = new IPSet( $this->proxyServersComplex ); |
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} |
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return $this->proxyIPSet->match( $ip ); |
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} |
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/** |
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* Checks if an IP is a trusted proxy provider. |
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* Useful to tell if X-Forwarded-For data is possibly bogus. |
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* CDN cache servers for the site are whitelisted. |
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* |
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* @param string $ip |
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* @return bool |
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*/ |
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public function isTrustedProxy( $ip ) { |
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$trusted = $this->isConfiguredProxy( $ip ); |
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Hooks::run( 'IsTrustedProxy', [ &$ip, &$trusted ] ); |
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return $trusted; |
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} |
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} |
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wikimedia /
mediawiki
Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: