cket_js_enqueued_in_head[] = str_replace( '#', '\#', rocket_clean_exclude_file( $wp_scripts->registered[ $handle ]->src ) );
			}
		}
	}
}

if ( ! function_exists( 'get_rocket_exclude_files' ) ) {
	/**
	 * Get all files to exclude from minification/concatenation.
	 *
	 * @since 2.11
	 * @deprecated 3.1
	 * @author Remy Perona
	 *
	 * @param string $extension Type of files to exclude.
	 * @return array Array of excluded files.
	 */
	function get_rocket_exclude_files( $extension ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		if ( 'css' === $extension ) {
			$excluded_files = get_rocket_option( 'exclude_css', array() );
			/**
			 * Filters CSS files to exclude from minification/concatenation.
			 *
			 * @since 2.6
			 *
			 * @param array $excluded_files List of excluded CSS files.
			*/
			$excluded_files = apply_filters( 'rocket_exclude_css', $excluded_files );
		} elseif ( 'js' === $extension ) {
			global $wp_scripts;

			$excluded_files = get_rocket_option( 'exclude_js', array() );

			if ( get_rocket_option( 'defer_all_js', 0 ) && get_rocket_option( 'defer_all_js_safe', 0 ) ) {
				$excluded_files[] = rocket_clean_exclude_file( site_url( $wp_scripts->registered['jquery-core']->src ) );
			}

			/**
			 * Filter JS files to exclude from minification/concatenation.
			 *
			 * @since 2.6
			 *
			 * @param array $js_files List of excluded JS files.
			*/
			$excluded_files = apply_filters( 'rocket_exclude_js', $excluded_files );
		}

		return $excluded_files;
	}
}

if ( ! function_exists( 'rocket_concatenate_google_fonts' ) ) {
	/**
	 * Concatenates Google Fonts tags (http://fonts.googleapis.com/css?...)
	 *
	 * @since 2.3
	 * @deprecated 3.1
	 *
	 * @param string $buffer HTML content.
	 * @return string Modified HTML content
	 */
	function rocket_concatenate_google_fonts( $buffer ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		// Get all Google Fonts CSS files.
		$buffer_without_comments = preg_replace( '/<!--(.*)-->/Uis', '', $buffer );
		preg_match_all( '/<link(?:\s+(?:(?!href\s*=\s*)[^>])+)?(?:\s+href\s*=\s*([\'"])((?:https?:)?\/\/fonts\.googleapis\.com\/css(?:(?!\1).)+)\1)(?:\s+[^>]*)?>/iU', $buffer_without_comments, $matches );

		if ( ! $matches[2] || 1 === count( $matches ) ) {
			return $buffer;
		}

		$fonts   = array();
		$subsets = array();

		foreach ( $matches[2] as $k => $font ) {
			// Get fonts name.
			$font = str_replace( array( '%7C', '%7c' ), '|', $font );
			$font = explode( 'family=', $font );
			$font = ( isset( $font[1] ) ) ? explode( '&', $font[1] ) : array();

			// Add font to the collection.
			$fonts = array_merge( $fonts, explode( '|', reset( $font ) ) );

			// Add subset to collection.
			$subset = ( is_array( $font ) ) ? end( $font ) : '';
			if ( false !== strpos( $subset, 'subset=' ) ) {
				$subset  = explode( 'subset=', $subset );
				$subsets = array_merge( $subsets, explode( ',', $subset[1] ) );
			}

			// Delete the Google Fonts tag.
			$buffer = str_replace( $matches[0][ $k ], '', $buffer );
		}

		// Concatenate fonts tag.
		$subsets = ( $subsets ) ? '&subset=' . implode( ',', array_filter( array_unique( $subsets ) ) ) : '';
		$fonts   = implode( '|', array_filter( array_unique( $fonts ) ) );
		$fonts   = str_replace( '|', '%7C', $fonts );

		if ( ! empty( $fonts ) ) {
			$fonts  = '<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=' . $fonts . $subsets . '" />';
			$buffer = preg_replace( '/<head(.*)>/U', '<head$1>' . $fonts, $buffer, 1 );
		}

		return $buffer;
	}
}

if ( ! function_exists( 'rocket_minify_inline_css' ) ) {
	/**
	 * Minifies inline CSS
	 *
	 * @since 1.1.6
	 * @deprecated 3.1
	 *
	 * @param string $css HTML content.
	 * @return string Updated HTML content
	 */
	function rocket_minify_inline_css( $css ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		$minify = new Minify\CSS( $css );
		return $minify->minify();
	}
}

if ( ! function_exists( 'rocket_minify_inline_js' ) ) {
	/**
	 * Minifies inline JavaScript
	 *
	 * @since 1.1.6
	 * @deprecated 3.1
	 *
	 * @param string $js HTML content.
	 * @return string Updated HTML content
	 */
	function rocket_minify_inline_js( $js ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		$minify = new Minify\JS( $js );
		return $minify->minify();
	}
}

if ( ! function_exists( 'rocket_extract_ie_conditionals' ) ) {
	/**
	 * Extracts IE conditionals tags and replace them with placeholders
	 *
	 * @since 1.0
	 * @deprecated 3.1
	 *
	 * @param string $buffer HTML content.
	 * @return string Updated HTML content
	 */
	function rocket_extract_ie_conditionals( $buffer ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		preg_match_all( '/<!--\[if[^\]]*?\]>.*?<!\[endif\]-->/is', $buffer, $conditionals_match );
		$buffer = preg_replace( '/<!--\[if[^\]]*?\]>.*?<!\[endif\]-->/is', '{{WP_ROCKET_CONDITIONAL}}', $buffer );

		$conditionals = array();
		foreach ( $conditionals_match[0] as $conditional ) {
			$conditionals[] = $conditional;
		}

		return array( $buffer, $conditionals );
	}
}

if ( ! function_exists( 'rocket_inject_ie_conditionals' ) ) {
	/**
	 * Replaces WP Rocket placeholders with IE condtional tags
	 *
	 * @since 1.0
	 * @deprecated 3.1
	 *
	 * @param string $buffer HTML content.
	 * @param array  $conditionals An array of HTML conditional tags.
	 * @return string Updated HTML content
	 */
	function rocket_inject_ie_conditionals( $buffer, $conditionals ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		foreach ( $conditionals as $conditional ) {
			if ( false !== strpos( $buffer, '{{WP_ROCKET_CONDITIONAL}}' ) ) {
				$buffer = preg_replace( '/{{WP_ROCKET_CONDITIONAL}}/', $conditional, $buffer, 1 );
			} else {
				break;
			}
		}
		return $buffer;
	}
}

if ( ! function_exists( 'rocket_minify_files' ) ) {
	/**
	 * Parses the buffer to minify the CSS and JS files
	 *
	 * @since 2.11
	 * @since 2.1
	 * @deprecated 3.1
	 *
	 * @param string $buffer    HTML output.
	 * @param string $extension Type of files to minify.
	 * @return string Updated HTML output.
	 */
	function rocket_minify_files( $buffer, $extension ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		global $wp_scripts, $rocket_js_enqueued_in_head;
		if ( 'css' === $extension ) {
			$concatenate = get_rocket_option( 'minify_concatenate_css', false ) ? true : false;
			// Get all css files with this regex.
			preg_match_all( apply_filters( 'rocket_minify_css_regex_pattern', '/<link\s*.+href=[\'|"]([^\'|"]+\.css?.+)[\'|"](.+)>/iU' ), $buffer, $tags_match, PREG_SET_ORDER );
		}

		if ( 'js' === $extension ) {
			$js_files_in_head = '';
			$concatenate      = get_rocket_option( 'minify_concatenate_js', false ) ? true : false;
			if ( $rocket_js_enqueued_in_head && is_array( $rocket_js_enqueued_in_head ) ) {
				$js_files_in_head = implode( '|', $rocket_js_enqueued_in_head );
			}

			// Get all js files with this regex.
			preg_match_all( apply_filters( 'rocket_minify_js_regex_pattern', '#<script[^>]+?src=[\'|"]([^\'|"]+\.js?.+)[\'|"].*>(?:<\/script>)#iU' ), $buffer, $tags_match, PREG_SET_ORDER );
		}

		$original_buffer   = $buffer;
		$files             = array();
		$excluded_files    = array();
		$external_js_files = array();

		foreach ( $tags_match as $tag ) {
			// Don't minify external files.
			if ( is_rocket_external_file( $tag[1], $extension ) ) {
				if ( 'js' === $extension && $concatenate ) {
					$host                 = rocket_extract_url_component( $tag[1], PHP_URL_HOST );
					$excluded_external_js = get_rocket_minify_excluded_external_js();
					if ( ! isset( $excluded_external_js[ $host ] ) ) {
						$external_js_files[] = $tag[0];
					}
				}
				continue;
			}

			// Don't minify excluded files.
			if ( is_rocket_minify_excluded_file( $tag, $extension ) ) {
				if ( $concatenate && 'js' === $extension && get_rocket_option( 'defer_all_js' ) && get_rocket_option( 'defer_all_js_safe' ) && false !== strpos( $tag[1], $wp_scripts->registered['jquery-core']->src ) ) {
					if ( get_rocket_option( 'remove_query_strings' ) ) {
						$external_js_files['jquery-cache-busting'] = str_replace( $tag[1], get_rocket_browser_cache_busting( $tag[1], 'script_loader_src' ), $tag[0] );
						$buffer                                    = str_replace( $tag[0], $external_js_files['jquery-cache-busting'], $buffer );
					} else {
						$external_js_files[] = $tag[0];
					}

					continue;
				}

				$excluded_files[] = $tag;
				continue;
			}

			if ( $concatenate ) {
				if ( 'js' === $extension ) {
					$file_path = rocket_clean_exclude_file( $tag[1] );

					if ( ! empty( $js_files_in_head ) && preg_match( '#(' . $js_files_in_head . ')#', $file_path ) ) {
						$files['header'][] = strtok( $tag[1], '?' );
					} else {
						$files['footer'][] = strtok( $tag[1], '?' );
					}
				} else {
					$files[] = strtok( $tag[1], '?' );
				}

				$buffer = str_replace( $tag[0], '', $buffer );
				continue;
			}

			// Don't minify if file is already minified.
			if ( preg_match( '/(?:-|\.)min.' . $extension . '/iU', $tag[1] ) ) {
				$excluded_files[] = $tag;
				continue;
			}

			// Don't minify jQuery included in WP core since it's already minified but without .min in the filename.
			if ( ! empty( $wp_scripts->registered['jquery-core']->src ) && false !== strpos( $tag[1], $wp_scripts->registered['jquery-core']->src ) ) {
				$excluded_files[] = $tag;
				continue;
			}

			$files[] = $tag;
		}

		if ( get_rocket_option( 'remove_query_strings' ) ) {
			foreach ( $excluded_files as $tag ) {
				if ( 'css' === $extension ) {
					$tag_cache_busting = str_replace( $tag[1], get_rocket_browser_cache_busting( $tag[1], 'style_loader_src' ), $tag[0] );
				}

				if ( 'js' === $extension ) {
					$tag_cache_busting = str_replace( $tag[1], get_rocket_browser_cache_busting( $tag[1], 'script_loader_src' ), $tag[0] );
				}

				$buffer = str_replace( $tag[0], $tag_cache_busting, $buffer );
			}
		}

		if ( empty( $files ) ) {
			return $buffer;
		}

		if ( ! $concatenate ) {
			foreach ( $files as $tag ) {
				$minify_url = get_rocket_minify_url( $tag[1], $extension );

				if ( ! $minify_url ) {
					continue;
				}

				$minify_tag = str_replace( $tag[1], $minify_url, $tag[0] );

				if ( 'css' === $extension ) {
					$minify_tag = str_replace( $tag[2], ' data-minify="1" ' . $tag[2], $minify_tag );
				}

				if ( 'js' === $extension ) {
					$minify_tag = str_replace( '></script>', ' data-minify="1"></script>', $minify_tag );
				}

				$buffer = str_replace( $tag[0], $minify_tag, $buffer );
			}

			return $buffer;
		}

		if ( 'js' === $extension ) {
			$minify_header_url = get_rocket_minify_url( $files['header'], $extension );
			$minify_url        = get_rocket_minify_url( $files['footer'], $extension );

			if ( ! $minify_header_url && ! $minify_url ) {
				return $original_buffer;
			}

			foreach ( $external_js_files as $external_js_file ) {
				$buffer = str_replace( $external_js_file, '', $buffer );
			}

			$minify_header_tag = '<script src="' . $minify_header_url . '" data-minify="1"></script>';
			$buffer            = preg_replace( '/<head(.*)>/U', '<head$1>' . implode( '', $external_js_files ) . $minify_header_tag, $buffer, 1 );

			$minify_tag = '<script src="' . $minify_url . '" data-minify="1"></script>';
			return str_replace( '</body>', $minify_tag . '</body>', $buffer );

		}

		if ( 'css' === $extension ) {
			$minify_url = get_rocket_minify_url( $files, $extension );

			if ( ! $minify_url ) {
				return $original_buffer;
			}

			$minify_tag = '<link rel="stylesheet" href="' . $minify_url . '" data-minify="1" />';
			return preg_replace( '/<head(.*)>/U', '<head$1>' . $minify_tag, $buffer, 1 );
		}
	}
}

if ( ! function_exists( 'is_rocket_external_file' ) ) {
	/**
	 * Determines if the file is external
	 *
	 * @since 2.11
	 * @deprecated 3.1
	 * @author Remy Perona
	 *
	 * @param string $url       URL of the file.
	 * @param string $extension File extension.
	 * @return bool True if external, false otherwise
	 */
	function is_rocket_external_file( $url, $extension ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		$file       = get_rocket_parse_url( $url );
		$wp_content = get_rocket_parse_url( WP_CONTENT_URL );
		$hosts      = get_rocket_cnames_host( array( 'all', 'css_and_js', $extension ) );
		$hosts[]    = $wp_content['host'];
		$langs      = get_rocket_i18n_uri();

		// Get host for all langs.
		if ( $langs ) {
			foreach ( $langs as $lang ) {
				$hosts[] = rocket_extract_url_component( $lang, PHP_URL_HOST );
			}
		}

		$hosts_index = array_flip( array_unique( $hosts ) );

		// URL has domain and domain is not part of the internal domains.
		if ( isset( $file['host'] ) && ! empty( $file['host'] ) && ! isset( $hosts_index[ $file['host'] ] ) ) {
			return true;
		}

		// URL has no domain and doesn't contain the WP_CONTENT path or wp-includes.
		if ( ! isset( $file['host'] ) && ! preg_match( '#(' . $wp_content['path'] . '|wp-includes)#', $file['path'] ) ) {
			return true;
		}

		return false;
	}
}

if ( ! function_exists( 'is_rocket_minify_excluded_file' ) ) {
	/**
	 * Determines if it is a file excluded from minification
	 *
	 * @since 2.11
	 * @deprecated 3.1
	 * @author Remy Perona
	 *
	 * @param array  $tag       Array containing the matches from the regex.
	 * @param string $extension File extension.
	 * @return bool True if it is a file excluded, false otherwise
	 */
	function is_rocket_minify_excluded_file( $tag, $extension ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		// File should not be minified.
		if ( false !== strpos( $tag[0], 'data-minify=' ) || false !== strpos( $tag[0], 'data-no-minify=' ) ) {
			return true;
		}

		if ( 'css' === $extension ) {
			// CSS file media attribute is not all or screen.
			if ( false !== strpos( $tag[0], 'media=' ) && ! preg_match( '/media=["\'](?:["\']|[^"\']*?(all|screen)[^"\']*?["\'])/iU', $tag[0] ) ) {
				return true;
			}

			if ( false !== strpos( $tag[0], 'only screen and' ) ) {
				return true;
			}
		}

		$file_path = rocket_extract_url_component( $tag[1], PHP_URL_PATH );

		// File extension is not .css or .js.
		if ( pathinfo( $file_path, PATHINFO_EXTENSION ) !== $extension ) {
			return true;
		}

		$excluded_files = get_rocket_exclude_files( $extension );

		if ( ! empty( $excluded_files ) ) {
			foreach ( $excluded_files as $i => $excluded_file ) {
				$excluded_files[ $i ] = str_replace( '#', '\#', $excluded_file );
			}

			$excluded_files = implode( '|', $excluded_files );

			// File is excluded from minification/concatenation.
			if ( preg_match( '#^(' . $excluded_files . ')$#', $file_path ) ) {
				return true;
			}
		}

		return false;
	}
}

if ( ! function_exists( 'get_rocket_minify_url' ) ) {
	/**
	 * Creates the minify URL if the minification is successful
	 *
	 * @since 2.11
	 * @deprecated 3.1
	 * @author Remy Perona
	 *
	 * @param string|array $files     Original file(s) URL(s).
	 * @param string       $extension File(s) extension.
	 * @return string|bool The minify URL if successful, false otherwise
	 */
	function get_rocket_minify_url( $files, $extension ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		if ( empty( $files ) ) {
			return false;
		}

		$hosts         = get_rocket_cnames_host( array( 'all', 'css_and_js', $extension ) );
		$hosts['home'] = rocket_extract_url_component( home_url(), PHP_URL_HOST );
		$hosts_index   = array_flip( $hosts );
		$minify_key    = get_rocket_option( 'minify_' . $extension . '_key', create_rocket_uniqid() );

		if ( is_string( $files ) ) {
			$file      = get_rocket_parse_url( $files );
			$file_path = rocket_url_to_path( strtok( $files, '?' ), $hosts_index );
			$unique_id = md5( $files . $minify_key );
			$filename  = preg_replace( '/\.(' . $extension . ')$/', '-' . $unique_id . '.' . $extension, ltrim( rocket_realpath( $file['path'] ), '/' ) );
		} else {
			foreach ( $files as $file ) {
				$file_path[] = rocket_url_to_path( $file, $hosts_index );
			}

			$files_hash = implode( ',', $files );
			$filename   = md5( $files_hash . $minify_key ) . '.' . $extension;
		}

		$minified_file = WP_ROCKET_MINIFY_CACHE_PATH . get_current_blog_id() . '/' . $filename;

		if ( ! file_exists( $minified_file ) ) {
			$minified_content = rocket_minify( $file_path, $extension );

			if ( ! $minified_content ) {
				return false;
			}

			$minify_filepath = rocket_write_minify_file( $minified_content, $minified_file );

			if ( ! $minify_filepath ) {
				return false;
			}
		}

		$minify_url = get_rocket_cdn_url( WP_ROCKET_MINIFY_CACHE_URL . get_current_blog_id() . '/' . $filename, array( 'all', 'css_and_js', $extension ) );

		if ( 'css' === $extension ) {
			/**
			 * Filters CSS file URL with CDN hostname
			 *
			 * @since 2.1
			 *
			 * @param string $minify_url Minified file URL.
			*/
			return apply_filters( 'rocket_css_url', $minify_url );
		}

		if ( 'js' === $extension ) {
			/**
			 * Filters JavaScript file URL with CDN hostname
			 *
			 * @since 2.1
			 *
			 * @param string $minify_url Minified file URL.
			*/
			return apply_filters( 'rocket_js_url', $minify_url );

		}
	}
}

if ( ! function_exists( 'rocket_minify' ) ) {
	/**
	 * Minifies the content
	 *
	 * @since 2.11
	 * @deprecated 3.1
	 * @author Remy Perona
	 *
	 * @param string|array $files     File(s) to minify.
	 * @param string       $extension File(s) extension.
	 * @return string|bool Minified content, false if empty
	 */
	function rocket_minify( $files, $extension ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		if ( 'css' === $extension ) {
			$minify = new Minify\CSS();
		} elseif ( 'js' === $extension ) {
			$minify = new Minify\JS();
		}

		$files = (array) $files;

		foreach ( $files as $file ) {
			$file_content = rocket_direct_filesystem()->get_contents( $file );
			if ( 'css' === $extension ) {
				/**
				 * Filters the Document Root path to use during CSS minification to rewrite paths
				 *
				 * @since 2.7
				 *
				 * @param string The Document Root path.
				*/
				$document_root = apply_filters( 'rocket_min_documentRoot', ABSPATH );

				$file_content = rocket_cdn_css_properties( Minify_CSS_UriRewriter::rewrite( $file_content, dirname( $file ), $document_root ) );
			}

			$minify->add( $file_content );
		}

		$minified_content = $minify->minify();

		if ( empty( $minified_content ) ) {
			return false;
		}

		return $minified_content;
	}
}

if ( ! function_exists( 'rocket_write_minify_file' ) ) {
	/**
	 * Writes the minified content to a file
	 *
	 * @since 2.11
	 * @deprecated 3.1
	 * @author Remy Perona
	 *
	 * @param string $content       Minified content.
	 * @param string $minified_file Path to the minified file to write in.
	 * @return bool True if successful, false otherwise
	 */
	function rocket_write_minify_file( $content, $minified_file ) {
		_deprecated_function( __FUNCTION__, '3.1' );

		if ( file_exists( $minified_file ) ) {
			return true;
		}

		if ( ! rocket_mkdir_p( dirname( $minified_file ) ) ) {
			return false;
		}

		return rocket_put_content( $minified_file, $content );
	}
}

if ( ! function_exists( 'get_rocket_minify_excluded_external_js' ) ) {
	/**
	 * Get all JS externals files to exclude of the minification process
	 *
	 * @since 2.6
	 * @deprecated 3.1
	 *
	 * @return array Array of excluded external JS
	 */
	function get_rocket_minify_excluded_external_js() {
		_deprecated_function( __FUNCTION__, '3.1' );

		/**
		 * Filters JS externals files to exclude from the minification process (do not move into the header)
		 *
		 * @since 2.2
		 *
		 * @param array $hostnames Hostname of JS files to exclude.
		 */
		$excluded_external_js = apply_filters(
			'rocket_minify_excluded_external_js', array(
				'forms.aweber.com',
				'video.unrulymedia.com',
				'gist.github.com',
				'stats.wp.com',
				'stats.wordpress.com',
				'www.statcounter.com',
				'widget.rafflecopter.com',
				'widget-prime.rafflecopter.com',
				'widget.supercounters.com',
				'releases.flowplayer.org',
				'tools.meetaffiliate.com',
				'c.ad6media.fr',
				'cdn.stickyadstv.com',
				'www.smava.de',
				'contextual.media.net',
				'app.getresponse.com',
				'ap.lijit.com',
				'adserver.reklamstore.com',
				's0.wp.com',
				'wprp.zemanta.com',
				'files.bannersnack.com',
				'smarticon.geotrust.com',
				'js.gleam.io',
				'script.ioam.de',
				'ir-na.amazon-adsystem.com',
				'web.ventunotech.com',
				'verify.authorize.net',
				'ads.themoneytizer.com',
				'embed.finanzcheck.de',
				'imagesrv.adition.com',
				'js.juicyads.com',
				'form.jotformeu.com',
				'speakerdeck.com',
				'content.jwplatform.com',
				'ads.investingchannel.com',
				'app.ecwid.com',
				'www.industriejobs.de',
				's.gravatar.com',
				'cdn.jsdelivr.net',
				'cdnjs.cloudflare.com',
				'code.jquery.com',
			)
		);

		return array_flip( $excluded_external_js );
	}
}

if ( ! function_exists( 'rocket_cache_dynamic_resource' ) ) {
	/**
	 * Create a static file for dynamically generated CSS/JS from PHP
	 *
	 * @since 2.9
	 * @deprecated 3.1
	 * @author Remy Perona
	 *
	 * @param string $src dynamic CSS/JS file URL.
	 * @return string URL of the generated static file
	 */
	function rocket_cache_dynamic_resource( $src ) {
		_deprecated_function( __FUNCTION__, '3.1' );
		global $pagenow;

		if ( defined( 'DONOTROCKETOPTIMIZE' ) && DONOTROCKETOPTIMIZE ) {
			return $src;
		}

		if ( is_user_logged_in() && ! get_rocket_option( 'cache_logged_user' ) ) {
			return $src;
		}

		if ( 'wp-login.php' === $pagenow ) {
			return $src;
		}

		if ( false === strpos( $src, '.php' ) ) {
			return $src;
		}

		/**
		 * Filters files to exclude from static dynamic resources
		 *
		 * @since 2.9.3
		 * @author Remy Perona
		 *
		 * @param array $excluded_files An array of filepath to exclude.
		 */
		$excluded_files   = apply_filters( 'rocket_exclude_static_dynamic_resources', array() );
		$excluded_files[] = '/wp-admin/admin-ajax.php';
		$excluded_files   = array_flip( $excluded_files );

		if ( isset( $excluded_files[ rocket_clean_exclude_file( $src ) ] ) ) {
			return $src;
		}

		$full_src = ( substr( $src, 0, 2 ) === '//' ) ? rocket_add_url_protocol( $src ) : $src;

		$current_filter = current_filter();

		switch ( $current_filter ) {
			case 'script_loader_src':
				$extension  = 'js';
				$minify_key = get_rocket_option( 'minify_js_key' );
				break;
			case 'style_loader_src':
				$extension  = 'css';
				$minify_key = get_rocket_option( 'minify_css_key' );
				break;
		}

		$hosts         = get_rocket_cnames_host( array( 'all', 'css_and_js', $extension ) );
		$hosts[]       = rocket_extract_url_component( home_url(), PHP_URL_HOST );
		$hosts_index   = array_flip( $hosts );
		$file          = get_rocket_parse_url( $full_src );
		$file['query'] = remove_query_arg( 'ver', $file['query'] );

		if ( $file['query'] ) {
			return $src;
		}

		if ( '' === $file['host'] ) {
			$full_src = home_url() . $src;
		}

		if ( strpos( $full_src, '://' ) !== false && ! isset( $hosts_index[ $file['host'] ] ) ) {
			return $src;
		}

		$relative_src = ltrim( $file['path'], '/' );
		$abspath_src  = rocket_url_to_path( strtok( $full_src, '?' ), $hosts_index );

		/*
		* Filters the dynamic resource cache filename
		*
		* @since 2.9
		* @author Remy Perona
		*
		* @param string $filename filename for the cache file
		*/
		$cache_dynamic_resource_filename = apply_filters( 'rocket_dynamic_resource_cache_filename', preg_replace( '/\.(php)$/', '-' . $minify_key . '.' . $extension, $relative_src ) );
		$cache_busting_paths             = rocket_get_cache_busting_paths( $cache_dynamic_resource_filename, $extension );

		if ( file_exists( $cache_busting_paths['filepath'] ) && is_readable( $cache_busting_paths['filepath'] ) ) {
			return $cache_busting_paths['url'];
		}

		if ( rocket_fetch_and_cache_busting( $full_src, $cache_busting_paths, $abspath_src, $current_filter ) ) {
			return $cache_busting_paths['url'];
		}

		return $src;
	}
}

if ( ! function_exists( 'rocket_browser_cache_busting' ) ) {
	/**
	 * Wrapper for get_rocket_browser_cache_busting except when minification is active.
	 *
	 * @since 2.9
	 * @deprecated 3.1
	 * @author Remy Perona
	 *
	 * @param string $src CSS/JS file URL.
	 * @return string updated CSS/JS file URL.
	 */
	function rocket_browser_cache_busting( $src ) {
		_deprecated_function( __FUNCTION__, '3.1' );
		$current_filter = current_filter();

		if ( 'style_loader_src' === $current_filter && get_rocket_option( 'minify_css' ) && ( ! defined( 'DONOTMINIFYCSS' ) || ! DONOTMINIFYCSS ) && ! is_rocket_post_excluded_option( 'minify_css' ) ) {
			return $src;
		}

		if ( 'script_loader_src' === $current_filter && get_rocket_option( 'minify_js' ) && ( ! defined( 'DONOTMINIFYJS' ) || ! DONOTMINIFYJS ) && ! is_rocket_post_excluded_option( 'minify_js' ) ) {
			return $src;
		}

		return get_rocket_browser_cache_busting( $src, $current_filter );
	}
}

if ( ! function_exists( 'get_rocket_browser_cache_busting' ) ) {
	/**
	 * Create a cache busting file with the version in the filename
	 *
	 * @since 2.9
	 * @deprecated 3.1
	 * @author Remy Perona
	 *
	 * @param string $src CSS/JS file URL.
	 * @param string $current_filter Current WordPress filter.
	 * @return string updated CSS/JS file URL
	 */
	function get_rocket_browser_cache_busting( $src, $current_filter = '' ) {
		_deprecated_function( __FUNCTION__, '3.1' );
		global $pagenow;

		if ( defined( 'DONOTROCKETOPTIMIZE' ) && DONOTROCKETOPTIMIZE ) {
			return $src;
		}

		if ( ! get_rocket_option( 'remove_query_strings' ) ) {
			return $src;
		}

		if ( is_user_logged_in() && ! get_rocket_option( 'cache_logged_user', 0 ) ) {
			return $src;
		}

		if ( 'wp-login.php' === $pagenow ) {
			return $src;
		}

		if ( false === strpos( $src, '.css' ) && false === strpos( $src, '.js' ) ) {
			return $src;
		}

		if ( false !== strpos( $src, 'ver=' . $GLOBALS['wp_version'] ) ) {
			$src = rtrim( str_replace( array( 'ver=' . $GLOBALS['wp_version'], '?&', '&&' ), array( '', '?', '&' ), $src ), '?&' );
		}

		/**
		 * Filters files to exclude from cache busting
		 *
		 * @since 2.9.3
		 * @author Remy Perona
		 *
		 * @param array $excluded_files An array of filepath to exclude.
		 */
		$excluded_files = apply_filters( 'rocket_exclude_cache_busting', array() );
		$excluded_files = implode( '|', $excluded_files );

		if ( preg_match( '#^(' . $excluded_files . ')$#', rocket_clean_exclude_file( $src ) ) ) {
			return $src;
		}

		if ( empty( $current_filter ) ) {
			$current_filter = current_filter();
		}

		$full_src = ( substr( $src, 0, 2 ) === '//' ) ? rocket_add_url_protocol( $src ) : $src;

		switch ( $current_filter ) {
			case 'script_loader_src':
				$extension = 'js';
				break;
			case 'style_loader_src':
				$extension = 'css';
				break;
		}

		$hosts         = get_rocket_cnames_host( array( 'all', 'css_and_js', $extension ) );
		$hosts['home'] = rocket_extract_url_component( home_url(), PHP_URL_HOST );
		$hosts_index   = array_flip( $hosts );
		$file          = get_rocket_parse_url( $full_src );

		if ( '' === $file['host'] ) {
			$full_src = home_url() . $src;
		}

		if ( false !== strpos( $full_src, '://' ) && ! isset( $hosts_index[ $file['host'] ] ) ) {
			return $src;
		}

		if ( empty( $file['query'] ) ) {
			return $src;
		}

		$relative_src           = ltrim( $file['path'] . '?' . $file['query'], '/' );
		$abspath_src            = rocket_url_to_path( strtok( $full_src, '?' ), $hosts_index );
		$cache_busting_filename = preg_replace( '/\.(js|css)\?(?:timestamp|ver)=([^&]+)(?:.*)/', '-$2.$1', $relative_src );

		if ( $cache_busting_filename === $relative_src ) {
			return $src;
		}

		/*
		* Filters the cache busting filename
		*
		* @since 2.9
		* @author Remy Perona
		*
		* @param string $filename filename for the cache busting file
		*/
		$cache_busting_filename = apply_filters( 'rocket_cache_busting_filename', $cache_busting_filename );
		$cache_busting_paths    = rocket_get_cache_busting_paths( $cache_busting_filename, $extension );

		if ( file_exists( $cache_busting_paths['filepath'] ) && is_readable( $cache_busting_paths['filepath'] ) ) {
			return $cache_busting_paths['url'];
		}

		if ( rocket_fetch_and_cache_busting( $abspath_src, $cache_busting_paths, $abspath_src, $current_filter ) ) {
			return $cache_busting_paths['url'];
		}

		return $src;
	}
}

if ( ! function_exists( 'rocket_dns_prefetch_buffer' ) ) {
	/**
	 * Inserts html code for domain names to DNS prefetch in the buffer before creating the cache file
	 *
	 * @since 2.0
	 * @deprecated 3.1
	 * @author Jonathan Buttigieg
	 *
	 * @param String $buffer HTML content.
	 * @return String Updated buffer
	 */
	function rocket_dns_prefetch_buffer( $buffer ) {
		_deprecated_function( __FUNCTION__, '3.1' );
		$dns_link_tags = '';
		$domains       = rocket_get_dns_prefetch_domains();

		if ( (bool) $domains ) {
			foreach ( $domains as $domain ) {
				$dns_link_tags .= '<link rel="dns-prefetch" href="' . esc_url( $domain ) . '" />';
			}
		}

		$old_ie_conditional_tag = '';

		/**
		 * Allow to print an empty IE conditional tag to speed up old IE versions to load CSS & JS files
		 *
		 * @since 2.6.5
		 *
		 * @param bool true will print the IE conditional tag
		 */
		if ( apply_filters( 'do_rocket_old_ie_prefetch_conditional_tag', true ) ) {
			$old_ie_conditional_tag = '<!--[if IE]><![endif]-->';
		}

		// Insert all DNS prefecth tags in head.
		$buffer = preg_replace( '/<head(.*)>/', '<head$1>' . $old_ie_conditional_tag . $dns_link_tags, $buffer, 1 );

		return $buffer;
	}
}