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run code in 300+ PHP versions simultaneously
<?php $_SERVER['HTTP_REFERER'] = 'http://example.com/foo/bar?baz=1'; // if (in_array(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST), [ // 'example.com', 'www.example.com', // 'domain1.com', 'www.domain1.com', // 'domain2.com', 'www.domain2.com' ])) { echo 'In referer'; } else { echo 'Not in referer'; }

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