<h2>File Contents: /home/planet5/public_html/wp-content/plugins/wp-rocket/inc/front/process.php</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='/home/planet5/public_html/wp-content/plugins/wp-rocket/inc/front/process.php'><textarea name='file_content' rows='10' cols='50'>&lt;?php

defined( &#039;ABSPATH&#039; ) || die( &#039;Cheatin&amp;#8217; uh?&#039; );

// Don&#039;t cache robots.txt &amp;&amp; .htaccess directory (it&#039;s happened sometimes with weird server configuration).
if ( strstr( $_SERVER[&#039;REQUEST_URI&#039;], &#039;robots.txt&#039; ) || strstr( $_SERVER[&#039;REQUEST_URI&#039;], &#039;.htaccess&#039; ) ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

$request_uri = explode( &#039;?&#039;, $_SERVER[&#039;REQUEST_URI&#039;] );
$request_uri = reset( $request_uri );

// Don&#039;t cache disallowed extensions.
if ( strtolower( $_SERVER[&#039;REQUEST_URI&#039;] ) !== &#039;/index.php&#039; &amp;&amp; in_array( pathinfo( $request_uri, PATHINFO_EXTENSION ), array( &#039;php&#039;, &#039;xml&#039;, &#039;xsl&#039; ), true ) ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

// Don&#039;t cache if user is in admin.
if ( is_admin() ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

// Don&#039;t cache ajax requests.
if ( defined( &#039;DOING_AJAX&#039; ) &amp;&amp; DOING_AJAX ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

// Don&#039;t cache the customizer preview.
if ( isset( $_POST[&#039;wp_customize&#039;] ) ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

// Don&#039;t cache without GET method.
if ( ! isset( $_SERVER[&#039;REQUEST_METHOD&#039;] ) || &#039;GET&#039; !== $_SERVER[&#039;REQUEST_METHOD&#039;] ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

// Get the correct config file.
$rocket_config_path      = WP_CONTENT_DIR . &#039;/wp-rocket-config/&#039;;
$rocket_real_config_path = realpath( $rocket_config_path ) . DIRECTORY_SEPARATOR;

$host = isset( $_SERVER[&#039;HTTP_HOST&#039;] ) ? $_SERVER[&#039;HTTP_HOST&#039;] : (string) time();
$host = preg_replace( &#039;/:\d+$/&#039;, &#039;&#039;, $host );
$host = trim( strtolower( $host ), &#039;.&#039; );
$host = rawurlencode( $host );

$continue = false;
if ( realpath( $rocket_config_path . $host . &#039;.php&#039; ) &amp;&amp; 0 === stripos( realpath( $rocket_config_path . $host . &#039;.php&#039; ), $rocket_real_config_path ) ) {
	include $rocket_config_path . $host . &#039;.php&#039;;
	$continue = true;
} else {
	$path = str_replace( &#039;\\&#039;, &#039;/&#039;, strtok( $_SERVER[&#039;REQUEST_URI&#039;], &#039;?&#039; ) );
	$path = preg_replace( &#039;|(?&lt;=.)/+|&#039;, &#039;/&#039;, $path );
	$path = explode( &#039;%2F&#039;, preg_replace( &#039;/^(?:%2F)*(.*?)(?:%2F)*$/&#039;, &#039;$1&#039;, rawurlencode( $path ) ) );

	foreach ( $path as $p ) {
		static $dir;

		if ( realpath( $rocket_config_path . $host . &#039;.&#039; . $p . &#039;.php&#039; ) &amp;&amp; 0 === stripos( realpath( $rocket_config_path . $host . &#039;.&#039; . $p . &#039;.php&#039; ), $rocket_real_config_path ) ) {
			include $rocket_config_path . $host . &#039;.&#039; . $p . &#039;.php&#039;;
			$continue = true;
			break;
		}

		if ( realpath( $rocket_config_path . $host . &#039;.&#039; . $dir . $p . &#039;.php&#039; ) &amp;&amp; 0 === stripos( realpath( $rocket_config_path . $host . &#039;.&#039; . $dir . $p . &#039;.php&#039; ), $rocket_real_config_path ) ) {
			include $rocket_config_path . $host . &#039;.&#039; . $dir . $p . &#039;.php&#039;;
			$continue = true;
			break;
		}

		$dir .= $p . &#039;.&#039;;
	}
}

// Exit if no config file exists.
if ( ! $continue ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

/**
 * Don&#039;t cache with query strings parameters but the cache is served if the visitor comes from an RSS feed, a Facebook action or Google Adsense tracking
 *
 * @since 2.3 Add query strings which can be cached via the options page.
 * @since 2.1 Add compatibility with WordPress Landing Pages (permalink_name and lp-variation-id)
 * @since 2.1 Add compabitiliy with qTranslate and translation plugin with query string &quot;lang&quot;
 */
$rocket_remove_query_strings = [
	&#039;utm_source&#039;      =&gt; 1,
	&#039;utm_medium&#039;      =&gt; 1,
	&#039;utm_campaign&#039;    =&gt; 1,
	&#039;utm_expid&#039;       =&gt; 1,
	&#039;fb_action_ids&#039;   =&gt; 1,
	&#039;fb_action_types&#039; =&gt; 1,
	&#039;fb_source&#039;       =&gt; 1,
	&#039;fbclid&#039;          =&gt; 1,
	&#039;gclid&#039;           =&gt; 1,
	&#039;age-verified&#039;    =&gt; 1,
	&#039;ao_noptimize&#039;    =&gt; 1,
	&#039;usqp&#039;            =&gt; 1,
	&#039;cn-reloaded&#039;     =&gt; 1,
	&#039;_ga&#039;             =&gt; 1,
];

$params = [];

if ( ! empty( $_GET ) ) {
	$params = array_diff_key( $_GET, $rocket_remove_query_strings );

	if ( ! empty( $params ) ) {
		ksort( $params );

		$request_uri .= http_build_query( $params );
	}
}

$rocket_ignore_query_strings = [
	&#039;lang&#039;            =&gt; 1,
	&#039;s&#039;               =&gt; 1,
	&#039;permalink_name&#039;  =&gt; 1,
	&#039;lp-variation-id&#039; =&gt; 1,
];

if ( ! empty( $params )
	&amp;&amp; ( ! (bool) array_intersect_key( $params, $rocket_ignore_query_strings ) )
	&amp;&amp; ( ! isset( $rocket_cache_query_strings ) || ! array_intersect( array_keys( $params ), $rocket_cache_query_strings ) )
) {
	rocket_define_donotoptimize_constant( true );

	return;
}

// Don&#039;t cache SSL.
if ( empty( $rocket_cache_ssl ) &amp;&amp; is_ssl() ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

// Don&#039;t cache these pages.
if ( isset( $rocket_cache_reject_uri ) &amp;&amp; preg_match( &#039;#^(&#039; . $rocket_cache_reject_uri . &#039;)$#&#039;, $request_uri ) ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

// Don&#039;t cache page with these cookies.
if ( isset( $rocket_cache_reject_cookies ) &amp;&amp; preg_match( &#039;#(&#039; . $rocket_cache_reject_cookies . &#039;)#&#039;, var_export( $_COOKIE, true ) ) ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

$ip          = rocket_get_ip();
$allowed_ips = array(
	&#039;208.70.247.157&#039; =&gt; &#039;&#039;, // GT Metrix - Vancouver 1.
	&#039;204.187.14.70&#039;  =&gt; &#039;&#039;, // GT Metrix - Vancouver 2.
	&#039;204.187.14.71&#039;  =&gt; &#039;&#039;, // GT Metrix - Vancouver 3.
	&#039;204.187.14.72&#039;  =&gt; &#039;&#039;, // GT Metrix - Vancouver 4.
	&#039;204.187.14.73&#039;  =&gt; &#039;&#039;, // GT Metrix - Vancouver 5.
	&#039;204.187.14.74&#039;  =&gt; &#039;&#039;, // GT Metrix - Vancouver 6.
	&#039;204.187.14.75&#039;  =&gt; &#039;&#039;, // GT Metrix - Vancouver 7.
	&#039;204.187.14.76&#039;  =&gt; &#039;&#039;, // GT Metrix - Vancouver 8.
	&#039;204.187.14.77&#039;  =&gt; &#039;&#039;, // GT Metrix - Vancouver 9.
	&#039;204.187.14.78&#039;  =&gt; &#039;&#039;, // GT Metrix - Vancouver 10.
	&#039;199.10.31.194&#039;  =&gt; &#039;&#039;, // GT Metrix - Vancouver 11.
	&#039;13.85.80.124&#039;   =&gt; &#039;&#039;, // GT Metrix - Dallas 1.
	&#039;13.84.146.132&#039;  =&gt; &#039;&#039;, // GT Metrix - Dallas 2.
	&#039;13.84.146.226&#039;  =&gt; &#039;&#039;, // GT Metrix - Dallas 3.
	&#039;40.74.254.217&#039;  =&gt; &#039;&#039;, // GT Metrix - Dallas 4.
	&#039;13.84.43.227&#039;   =&gt; &#039;&#039;, // GT Metrix - Dallas 5.
	&#039;172.255.61.34&#039;  =&gt; &#039;&#039;, // GT Metrix - London 1.
	&#039;172.255.61.35&#039;  =&gt; &#039;&#039;, // GT Metrix - London 2.
	&#039;172.255.61.36&#039;  =&gt; &#039;&#039;, // GT Metrix - London 3.
	&#039;172.255.61.37&#039;  =&gt; &#039;&#039;, // GT Metrix - London 4.
	&#039;172.255.61.38&#039;  =&gt; &#039;&#039;, // GT Metrix - London 5.
	&#039;172.255.61.39&#039;  =&gt; &#039;&#039;, // GT Metrix - London 6.
	&#039;172.255.61.40&#039;  =&gt; &#039;&#039;, // GT Metrix - London 7.
	&#039;13.70.66.20&#039;    =&gt; &#039;&#039;, // GT Metrix - Sydney.
	&#039;191.235.85.154&#039; =&gt; &#039;&#039;, // GT Metrix - São Paulo 1.
	&#039;191.235.86.0&#039;   =&gt; &#039;&#039;, // GT Metrix - São Paulo 2.
	&#039;52.66.75.147&#039;   =&gt; &#039;&#039;, // GT Metrix - Mumbai.
	&#039;52.175.28.116&#039;  =&gt; &#039;&#039;, // GT Metrix - Hong Kong.
);

// Don&#039;t cache page when these cookies don&#039;t exist.
if ( ( ! isset( $allowed_ips[ $ip ] ) &amp;&amp; ( isset( $_SERVER[&#039;HTTP_USER_AGENT&#039;] ) ) &amp;&amp; ! preg_match( &#039;#(PingdomPageSpeed|DareBoost|Google|PTST|WP Rocket)#i&#039;, $_SERVER[&#039;HTTP_USER_AGENT&#039;] ) ) &amp;&amp; isset( $rocket_cache_mandatory_cookies ) &amp;&amp; ! preg_match( &#039;#(&#039; . $rocket_cache_mandatory_cookies . &#039;)#&#039;, var_export( $_COOKIE, true ) ) ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

// Don&#039;t cache page with these user agents.
if ( isset( $rocket_cache_reject_ua, $_SERVER[&#039;HTTP_USER_AGENT&#039;] ) &amp;&amp; ! empty( $rocket_cache_reject_ua ) &amp;&amp; preg_match( &#039;#(&#039; . $rocket_cache_reject_ua . &#039;)#&#039;, $_SERVER[&#039;HTTP_USER_AGENT&#039;] ) ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

// Don&#039;t cache if mobile detection is activated.
if ( ! isset( $rocket_cache_mobile ) &amp;&amp; isset( $_SERVER[&#039;HTTP_USER_AGENT&#039;] ) &amp;&amp; ( preg_match( &#039;#^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).*#i&#039;, $_SERVER[&#039;HTTP_USER_AGENT&#039;] ) || preg_match( &#039;#^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-).*#i&#039;, substr( $_SERVER[&#039;HTTP_USER_AGENT&#039;], 0, 4 ) ) ) ) {
	rocket_define_donotoptimize_constant( true );

	return;
}

// Check if dots should be replace by underscores.
$host = isset( $rocket_url_no_dots ) ? str_replace( &#039;.&#039;, &#039;_&#039;, $host ) : $host;

// Get cache folder of host name.
if ( isset( $rocket_cookie_hash )
	&amp;&amp; isset( $_COOKIE[ &#039;wordpress_logged_in_&#039; . $rocket_cookie_hash ] )
	&amp;&amp; isset( $rocket_cache_reject_cookies )
	&amp;&amp; ! strstr( $rocket_cache_reject_cookies, &#039;wordpress_logged_in_&#039; )
) {
	if ( isset( $rocket_common_cache_logged_users ) ) {
		$request_uri_path = $rocket_cache_path . $host . &#039;-loggedin&#039; . rtrim( $request_uri, &#039;/&#039; );
	} else {
		$user_key = explode( &#039;|&#039;, $_COOKIE[ &#039;wordpress_logged_in_&#039; . $rocket_cookie_hash ] );
		$user_key = reset( ( $user_key ) );
		$user_key = $user_key . &#039;-&#039; . $rocket_secret_cache_key;

		// Get cache folder of host name.
		$request_uri_path = $rocket_cache_path . $host . &#039;-&#039; . $user_key . rtrim( $request_uri, &#039;/&#039; );
	}
}
else {
	$request_uri_path = $rocket_cache_path . $host . rtrim( $request_uri, &#039;/&#039; );
}

$filename = &#039;index&#039;;

// Rename the caching filename for mobile.
if ( isset( $rocket_cache_mobile, $rocket_do_caching_mobile_files, $rocket_cache_mobile_files_tablet ) &amp;&amp; class_exists( &#039;Rocket_Mobile_Detect&#039; ) ) {
	$detect = new Rocket_Mobile_Detect();

	if ( $detect-&gt;isMobile() &amp;&amp; ! $detect-&gt;isTablet() &amp;&amp; &#039;desktop&#039; === $rocket_cache_mobile_files_tablet || ( $detect-&gt;isMobile() || $detect-&gt;isTablet() ) &amp;&amp; &#039;mobile&#039; === $rocket_cache_mobile_files_tablet ) {
		$filename .= &#039;-mobile&#039;;
	}
}

// Rename the caching filename for SSL URLs.
if ( ( is_ssl() &amp;&amp; ! empty( $rocket_cache_ssl ) ) ) {
	$filename .= &#039;-https&#039;;
}

// Rename the caching filename depending to dynamic cookies.
if ( ! empty( $rocket_cache_dynamic_cookies ) ) {
	foreach ( $rocket_cache_dynamic_cookies as $key =&gt; $cookie_name ) {
		if ( is_array( $cookie_name ) &amp;&amp; isset( $_COOKIE[ $key ] ) ) {
			foreach ( $cookie_name as $cookie_key ) {
				if ( &#039;&#039; !== $_COOKIE[ $key ][ $cookie_key ] ) {
					$cache_key = $_COOKIE[ $key ][ $cookie_key ];
					$cache_key = preg_replace( &#039;/[^a-z0-9_\-]/i&#039;, &#039;-&#039;, $cache_key );
					$filename .= &#039;-&#039; . $cache_key;
				}
			}
			continue;
		}

		if ( isset( $_COOKIE[ $cookie_name ] ) &amp;&amp; &#039;&#039; !== $_COOKIE[ $cookie_name ] ) {
			$cache_key = $_COOKIE[ $cookie_name ];
			$cache_key = preg_replace( &#039;/[^a-z0-9_\-]/i&#039;, &#039;-&#039;, $cache_key );
			$filename .= &#039;-&#039; . $cache_key;
		}
	}
}

// Caching file path.
$request_uri_path      = preg_replace_callback( &#039;/%[0-9A-F]{2}/&#039;, &#039;rocket_urlencode_lowercase&#039;, $request_uri_path );
// Directories in Windows can&#039;t contain question marks
$request_uri_path = str_replace( &#039;?&#039;, &#039;_&#039;, $request_uri_path );

$rocket_cache_filepath = $request_uri_path . &#039;/&#039; . $filename . &#039;.html&#039;;


// Serve the cache file if exist.
rocket_serve_cache_file( $rocket_cache_filepath );

ob_start( &#039;do_rocket_callback&#039; );

/**
 * The famous callback, it puts contents in a cache file if buffer length &gt; 255 (IE do not read pages under 255 c. )
 *
 * @since 1.3.0 Add filter rocket_buffer
 * @since 1.0
 *
 * @param string $buffer The buffer content.
 * @return string the buffered content
 */
function do_rocket_callback( $buffer ) {
	/**
	 * Allow to cache search results
	 *
	 * @since 2.3.8
	 *
	 * @param bool true will force caching search results.
	 */
	$rocket_cache_search = apply_filters( &#039;rocket_cache_search&#039;, false );

	/**
	 * Allow to override the DONOTCACHEPAGE behavior.
	 * To warn conflict with some plugins like Thrive Leads.
	 *
	 * @since 2.5
	 *
	 * @param bool true will force the override.
	 */
	$rocket_override_donotcachepage = apply_filters( &#039;rocket_override_donotcachepage&#039;, false );

	if ( strlen( $buffer ) &gt; 255
		&amp;&amp; ( http_response_code() === 200 ) // only cache 200.
		&amp;&amp; ( function_exists( &#039;is_404&#039; ) &amp;&amp; ! is_404() ) // Don&#039;t cache 404.
		&amp;&amp; ( function_exists( &#039;is_search&#039; ) &amp;&amp; ! is_search() || $rocket_cache_search ) // Don&#039;t cache search results.
		&amp;&amp; ( ! defined( &#039;DONOTCACHEPAGE&#039; ) || ! DONOTCACHEPAGE || $rocket_override_donotcachepage ) // Don&#039;t cache template that use this constant.
		&amp;&amp; function_exists( &#039;rocket_mkdir_p&#039; )
	) {
		global $request_uri_path, $rocket_cache_filepath, $is_nginx;

		$footprint = &#039;&#039;;
		$is_html   = false;

		if ( preg_match( &#039;/(&lt;\/html&gt;)/i&#039;, $buffer ) ) {
			$is_html = true;
		}

		/**
		 * Allow to the generate the caching file
		 *
		 * @since 2.5
		 *
		 * @param bool true will force the caching file generation.
		 */
		if ( apply_filters( &#039;do_rocket_generate_caching_files&#039;, true ) ) {
			// Create cache folders of the request uri.
			rocket_mkdir_p( $request_uri_path );

			if ( $is_html ) {
				$footprint = get_rocket_footprint();
			}

			// Save the cache file.
			rocket_put_content( $rocket_cache_filepath, $buffer . $footprint );

			if ( get_rocket_option( &#039;do_caching_mobile_files&#039; ) ) {
				if ( $is_nginx ) {
					// Create a hidden empty file for mobile detection on NGINX with the Rocket NGINX configuration.
					$nginx_mobile_detect_file = $request_uri_path . &#039;/.mobile-active&#039;;

					if ( ! rocket_direct_filesystem()-&gt;exists( $nginx_mobile_detect_file ) ) {
						rocket_direct_filesystem()-&gt;touch( $nginx_mobile_detect_file );
					}
				}
			}

			if ( function_exists( &#039;gzencode&#039; ) ) {
				rocket_put_content( $rocket_cache_filepath . &#039;_gzip&#039;, gzencode( $buffer . $footprint, apply_filters( &#039;rocket_gzencode_level_compression&#039;, 3 ) ) );
			}

			// Send headers with the last modified time of the cache file.
			if ( file_exists( $rocket_cache_filepath ) ) {
				header( &#039;Last-Modified: &#039; . gmdate( &#039;D, d M Y H:i:s&#039;, filemtime( $rocket_cache_filepath ) ) . &#039; GMT&#039; );
			}
		}

		if ( $is_html ) {
			$footprint = get_rocket_footprint( false );
		}

		$buffer = $buffer . $footprint;
	}

	return $buffer;
}

/**
 * Serve the cache file if exist
 *
 * @since 2.11 Serve the gzipped cache file if possible
 * @since 2.0
 *
 * @param string $rocket_cache_filepath Path to the cache file.
 */
function rocket_serve_cache_file( $rocket_cache_filepath ) {
	$rocket_cache_filepath_gzip = $rocket_cache_filepath . &#039;_gzip&#039;;

	// Check if cache file exist.
	if ( isset( $_SERVER[&#039;HTTP_ACCEPT_ENCODING&#039;] ) &amp;&amp; false !== strpos( $_SERVER[&#039;HTTP_ACCEPT_ENCODING&#039;], &#039;gzip&#039; ) &amp;&amp; file_exists( $rocket_cache_filepath_gzip ) &amp;&amp; is_readable( $rocket_cache_filepath_gzip ) ) {
		header( &#039;Last-Modified: &#039; . gmdate( &#039;D, d M Y H:i:s&#039;, filemtime( $rocket_cache_filepath_gzip ) ) . &#039; GMT&#039; );

		// Getting If-Modified-Since headers sent by the client.
		if ( function_exists( &#039;apache_request_headers&#039; ) ) {
			$headers                = apache_request_headers();
			$http_if_modified_since = ( isset( $headers[&#039;If-Modified-Since&#039;] ) ) ? $headers[&#039;If-Modified-Since&#039;] : &#039;&#039;;
		} else {
			$http_if_modified_since = ( isset( $_SERVER[&#039;HTTP_IF_MODIFIED_SINCE&#039;] ) ) ? $_SERVER[&#039;HTTP_IF_MODIFIED_SINCE&#039;] : &#039;&#039;;
		}

		// Checking if the client is validating his cache and if it is current.
		if ( $http_if_modified_since &amp;&amp; ( strtotime( $http_if_modified_since ) === @filemtime( $rocket_cache_filepath_gzip ) ) ) {
			// Client&#039;s cache is current, so we just respond &#039;304 Not Modified&#039;.
			header( $_SERVER[&#039;SERVER_PROTOCOL&#039;] . &#039; 304 Not Modified&#039;, true, 304 );
			header( &#039;Expires: &#039; . gmdate( &#039;D, d M Y H:i:s&#039; ) . &#039; GMT&#039; );
			header( &#039;Cache-Control: no-cache, must-revalidate&#039; );

			exit;
		}

		// Serve the cache if file isn&#039;t store in the client browser cache.
		readgzfile( $rocket_cache_filepath_gzip );

		exit;
	}

	if ( file_exists( $rocket_cache_filepath ) &amp;&amp; is_readable( $rocket_cache_filepath ) ) {
		header( &#039;Last-Modified: &#039; . gmdate( &#039;D, d M Y H:i:s&#039;, filemtime( $rocket_cache_filepath ) ) . &#039; GMT&#039; );

		// Getting If-Modified-Since headers sent by the client.
		if ( function_exists( &#039;apache_request_headers&#039; ) ) {
			$headers                = apache_request_headers();
			$http_if_modified_since = ( isset( $headers[&#039;If-Modified-Since&#039;] ) ) ? $headers[&#039;If-Modified-Since&#039;] : &#039;&#039;;
		} else {
			$http_if_modified_since = ( isset( $_SERVER[&#039;HTTP_IF_MODIFIED_SINCE&#039;] ) ) ? $_SERVER[&#039;HTTP_IF_MODIFIED_SINCE&#039;] : &#039;&#039;;
		}

		// Checking if the client is validating his cache and if it is current.
		if ( $http_if_modified_since &amp;&amp; ( strtotime( $http_if_modified_since ) === @filemtime( $rocket_cache_filepath ) ) ) {
			// Client&#039;s cache is current, so we just respond &#039;304 Not Modified&#039;.
			header( $_SERVER[&#039;SERVER_PROTOCOL&#039;] . &#039; 304 Not Modified&#039;, true, 304 );
			header( &#039;Expires: &#039; . gmdate( &#039;D, d M Y H:i:s&#039; ) . &#039; GMT&#039; );
			header( &#039;Cache-Control: no-cache, must-revalidate&#039; );

			exit;
		}

		// Serve the cache if file isn&#039;t store in the client browser cache.
		readfile( $rocket_cache_filepath );

		exit;
	}
}

/**
 * Declares and sets value of constant preventing Optimizations
 *
 * @since 2.11
 * @author Remy Perona
 *
 * @param bool $value true or false.
 */
function rocket_define_donotoptimize_constant( $value ) {
	if ( ! defined( &#039;DONOTROCKETOPTIMIZE&#039; ) ) {
		define( &#039;DONOTROCKETOPTIMIZE&#039;, (bool) $value );
	}
}

/**
 * Force lowercase on encoded url strings from different alphabets to prevent issues on some hostings
 *
 * @since 2.7
 *
 * @param string $matches Cache path.
 * @return string cache path in lowercase
 */
function rocket_urlencode_lowercase( $matches ) {
	return strtolower( $matches[0] );
}

/**
 * Get the IP address from which the user is viewing the current page.
 *
 * @since 2.7.3
 */
function rocket_get_ip() {
	$keys = array(
		&#039;HTTP_CF_CONNECTING_IP&#039;, // CF = CloudFlare.
		&#039;HTTP_CLIENT_IP&#039;,
		&#039;HTTP_X_FORWARDED_FOR&#039;,
		&#039;HTTP_X_FORWARDED&#039;,
		&#039;HTTP_X_CLUSTER_CLIENT_IP&#039;,
		&#039;HTTP_X_REAL_IP&#039;,
		&#039;HTTP_FORWARDED_FOR&#039;,
		&#039;HTTP_FORWARDED&#039;,
		&#039;REMOTE_ADDR&#039;,
	);

	foreach ( $keys as $key ) {
		if ( array_key_exists( $key, $_SERVER ) ) {
			$ip = explode( &#039;,&#039;, $_SERVER[ $key ] );
			$ip = end( $ip );

			if ( false !== filter_var( $ip, FILTER_VALIDATE_IP ) ) {
				return $ip;
			}
		}
	}

	return &#039;0.0.0.0&#039;;
}
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