-
-
Save andrewbrg/95145419a4ba6e53cbe417dcb8b43aa4 to your computer and use it in GitHub Desktop.
Detect crawlers/bots/spiders in PHP (simple and fast)
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<?php | |
/** | |
* Check if a request originated from a crawler, spider, or bot. | |
* | |
* @param null|string $userAgent | |
* @param array $identifiers | |
* @return bool | |
*/ | |
if (!function_exists('isBot')) { | |
function isBot($userAgent = null, $identifiers = array()) | |
{ | |
$userAgent = isset($userAgent) | |
? $userAgent | |
: $_SERVER['HTTP_USER_AGENT']; | |
$identifiers = !is_array($identifiers) | |
? array($identifiers) | |
: $identifiers; | |
$userAgent = trim(strtolower($userAgent)); | |
$_identifiers = array( | |
'bot', | |
'slurp', | |
'crawler', | |
'spider', | |
'curl', | |
'facebook', | |
'fetch' | |
); | |
$_identifiers = array_merge($_identifiers, $identifiers); | |
foreach ($_identifiers as $_identifier) { | |
if (strpos($userAgent, $_identifier) !== false) { | |
return true; | |
} | |
} | |
return false; | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment