30 * KB_IN_BYTES && strlen( $css ) < max( 2 * KB_IN_BYTES, (int) ( $total * 0.04 ) ) ) {
$mode = 'critical';
$css = Velox_CSS::build( $sheets, $fold, $safelist, $mode );
}
}
}
if ( '' === trim( $css ) ) {
return;
}
Velox_CSS::save_record(
self::$css_key,
array(
'mode' => $mode,
'css' => self::minify_css( $css ),
'handles' => $handles,
'files' => $files,
)
);
self::$css_pending = true;
}
public static function credit() {
if ( self::opt()['credit_link'] && self::should_run() ) {
echo '' . esc_html__( 'Optimized by AngelForce', 'angelforce-cache' ) . '
';
}
}
public static function strip_ver( $src ) {
return $src && false !== strpos( $src, 'ver=' ) ? remove_query_arg( 'ver', $src ) : $src;
}
private static function disable_emojis() {
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
remove_action( 'wp_print_styles', 'print_emoji_styles' );
remove_action( 'admin_print_styles', 'print_emoji_styles' );
remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );
remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
add_filter(
'tiny_mce_plugins',
function ( $plugins ) {
return is_array( $plugins ) ? array_diff( $plugins, array( 'wpemoji' ) ) : $plugins;
}
);
add_filter( 'emoji_svg_url', '__return_false' );
}
private static function disable_embeds() {
add_action(
'init',
function () {
remove_action( 'rest_api_init', 'wp_oembed_register_route' );
add_filter( 'embed_oembed_discover', '__return_false' );
remove_filter( 'oembed_dataparse', 'wp_filter_oembed_result', 10 );
remove_action( 'wp_head', 'wp_oembed_add_discovery_links' );
remove_action( 'wp_head', 'wp_oembed_add_host_js' );
},
9999
);
add_action(
'wp_enqueue_scripts',
function () {
wp_deregister_script( 'wp-embed' );
},
100
);
}
/* ---------- guards ---------- */
public static function should_run() {
if ( ! empty( $_SERVER['HTTP_X_VELOX_RAW'] ) && Velox_AI::is_raw_request() ) {
return false; // Our own site analysis fetch wants the untouched page.
}
if ( is_admin() || wp_doing_ajax() || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) || is_feed() || is_customize_preview() || is_preview() || defined( 'DONOTMINIFY' ) ) {
return false;
}
if ( isset( $_GET['velox_off'] ) && current_user_can( 'manage_options' ) ) { // phpcs:ignore WordPress.Security.NonceVerification -- admin-only troubleshooting view, nothing is changed.
return false;
}
// phpcs:ignore WordPress.Security.NonceVerification
foreach ( array( 'elementor-preview', 'et_fb', 'fl_builder', 'ct_builder', 'vc_editable', 'tve', 'brizy-edit', 'customize_changeset_uuid', 'preview', 'wc-ajax' ) as $k ) {
if ( isset( $_GET[ $k ] ) ) { // phpcs:ignore WordPress.Security.NonceVerification
return false;
}
}
return true;
}
private static function tokens( $text ) {
$out = array();
foreach ( preg_split( '/\r\n|\r|\n/', (string) $text ) as $l ) {
$l = trim( $l );
if ( '' !== $l ) {
$out[] = $l;
}
}
return $out;
}
/** User list + built-in compatibility list (cached per request). */
private static function delay_tokens() {
static $tokens = null;
if ( null === $tokens ) {
$tokens = self::tokens( self::$s['delay_exclude'] );
if ( self::$s['compat_list'] ) {
$tokens = array_merge( $tokens, Velox_Compat::delay_exclude() );
}
}
return $tokens;
}
private static function excluded( $haystack, $tokens ) {
foreach ( $tokens as $t ) {
if ( false !== stripos( $haystack, $t ) ) {
return true;
}
}
return false;
}
/* ---------- main pipeline ---------- */
/** Time spent on critical / used CSS in the current request (for the Server-Timing header). */
public static $css_ms = 0.0;
public static function process( $html ) {
if ( ! self::should_run() ) {
return $html;
}
$original = $html;
self::$s = Velox_Settings::all();
self::$img_count = 0;
self::$needs_yt = false;
self::$lcp_done = false;
self::$lcp_preload = array();
$s = self::$s;
if ( self::$css_needed ) {
$tc = microtime( true );
self::compute_css( $html );
self::$css_ms = ( microtime( true ) - $tc ) * 1000;
}
$html = self::brand( $html );
if ( $s['webp'] && self::accepts_webp() ) {
$r = preg_replace_callback( '#<(?:img|source)\b[^>]*>#i', array( __CLASS__, 'webp_cb' ), $html );
$html = null === $r ? $html : $r;
}
if ( $s['cdn_url'] ) {
$html = self::cdn( $html );
}
$protected = self::protect( $html );
if ( null === $protected ) {
return $original;
}
list( $html, $store ) = $protected;
if ( $s['lazy_youtube'] ) {
$html = self::youtube( $html );
}
if ( $s['lazy_images'] || $s['img_dimensions'] || $s['lcp_priority'] ) {
$r = preg_replace_callback( '#]*>#i', array( __CLASS__, 'img_cb' ), $html );
$html = null === $r ? $html : $r;
}
if ( $s['lazy_iframes'] ) {
$r = preg_replace_callback( '#]*>#i', array( __CLASS__, 'iframe_cb' ), $html );
$html = null === $r ? $html : $r;
}
if ( $s['html_minify'] ) {
$html = self::html_minify( $html );
}
$html = strtr( $html, $store );
return self::lcp_preload( $html );
}
/** Adds for the LCP image right after (unless the page already has one). */
private static function lcp_preload( $html ) {
if ( ! self::$lcp_preload ) {
return $html;
}
list( $src, $srcset, $sizes ) = self::$lcp_preload;
$hpos = stripos( $html, '' );
if ( false === $hpos || false !== stripos( substr( $html, 0, $hpos ), 'as="image"' ) ) {
return $html;
}
$link = '';
$r = preg_replace( '#(]*charset[^>]*>)#i', '$1' . str_replace( '$', '\\$', $link ), $html, 1, $count );
if ( ! $count ) {
$r = preg_replace( '#(]*>)#i', '$1' . str_replace( '$', '\\$', $link ), $html, 1 );
}
return null === $r ? $html : $r;
}
private static function protect( $html ) {
$store = array();
$i = 0;
$out = preg_replace_callback(
'#<(script|style|noscript|textarea|pre|code)\b[^>]*>.*?#is',
function ( $m ) use ( &$store, &$i ) {
$k = "\x02VLX" . ( $i++ ) . "\x03";
$store[ $k ] = $m[0];
return $k;
},
$html
);
return null === $out ? null : array( $out, $store );
}
/* ---------- brand: generator meta + source comment (no visible output) ---------- */
private static function brand( $html ) {
$tag = '';
$r = preg_replace_callback(
'#]*>#i',
function ( $m ) use ( $tag ) {
return $m[0] . "\n" . $tag;
},
$html,
1
);
$html = null === $r ? $html : $r;
return str_ireplace( '', '' . "\n" . '', $html, $c ) ?: $html;
}
/* ---------- head: dns-prefetch / preload fonts ---------- */
/* ---------- CSS ---------- */
public static function url_to_path( $url ) {
$url = set_url_scheme( $url, 'http' );
static $map = null;
if ( null !== $map ) {
return self::map_path( $url, $map );
}
$up = wp_upload_dir( null, false );
// Most specific first: plugins, themes and uploads can each live outside wp-content.
$map = array(
trailingslashit( set_url_scheme( plugins_url(), 'http' ) ) => trailingslashit( dirname( VELOX_DIR ) ),
trailingslashit( set_url_scheme( get_theme_root_uri(), 'http' ) ) => trailingslashit( get_theme_root() ),
trailingslashit( set_url_scheme( $up['baseurl'], 'http' ) ) => trailingslashit( $up['basedir'] ),
trailingslashit( set_url_scheme( content_url(), 'http' ) ) => trailingslashit( WP_CONTENT_DIR ),
trailingslashit( set_url_scheme( includes_url(), 'http' ) ) => self::includes_dir(),
);
return self::map_path( $url, $map );
}
/** Folder of the core wp-includes stylesheets (block library etc.), taken from where WordPress loaded its classes. */
private static function includes_dir() {
$ref = new ReflectionClass( 'WP_Styles' );
return trailingslashit( wp_normalize_path( dirname( (string) $ref->getFileName() ) ) );
}
private static function map_path( $url, $map ) {
foreach ( $map as $base_url => $base_path ) {
if ( 0 === strpos( $url, $base_url ) ) {
$rel = rawurldecode( substr( $url, strlen( $base_url ) ) );
if ( false !== strpos( $rel, "\0" ) ) {
return false;
}
$real = realpath( $base_path . $rel );
// The resolved file must stay inside the directory the URL was mapped to.
$root = realpath( $base_path );
if ( $real && $root && 0 === strpos( wp_normalize_path( $real ), trailingslashit( wp_normalize_path( $root ) ) ) ) {
return $real;
}
}
}
return false;
}
public static function absolutize_css( $css, $base ) {
$css = preg_replace_callback(
'/@import\s+([\'"])([^\'"]+)\1/i',
function ( $m ) use ( $base ) {
$u = trim( $m[2] );
if ( preg_match( '#^(data:|https?:|//|/)#i', $u ) ) {
return $m[0];
}
return '@import ' . $m[1] . self::resolve( $base, $u ) . $m[1];
},
$css
);
return preg_replace_callback(
'/url\(\s*([\'"]?)([^\'")]+)\1\s*\)/i',
function ( $m ) use ( $base ) {
$u = trim( $m[2] );
if ( preg_match( '#^(data:|https?:|//|/|\#)#i', $u ) ) {
return $m[0];
}
return 'url(' . $m[1] . self::resolve( $base, $u ) . $m[1] . ')';
},
$css
);
}
private static function resolve( $base, $rel ) {
if ( ! preg_match( '#^(https?://[^/]+)(/.*)$#i', $base, $b ) ) {
return $base . $rel;
}
$parts = explode( '/', trim( $b[2], '/' ) );
if ( '' === $parts[0] ) {
array_shift( $parts );
}
foreach ( explode( '/', $rel ) as $seg ) {
if ( '..' === $seg ) {
array_pop( $parts );
} elseif ( '.' !== $seg && '' !== $seg ) {
$parts[] = $seg;
}
}
return $b[1] . '/' . implode( '/', $parts );
}
public static function minify_css( $css ) {
$keep = array();
$i = 0;
$css = preg_replace_callback(
'/"(?:[^"\\\\]|\\\\.)*"|\'(?:[^\'\\\\]|\\\\.)*\'|url\([^)]*\)/i',
function ( $m ) use ( &$keep, &$i ) {
$k = "\x01" . ( $i++ ) . "\x01";
$keep[ $k ] = $m[0];
return $k;
},
$css
);
$css = preg_replace( '!/\*.*?\*/!s', '', $css );
$css = preg_replace( '/\s+/', ' ', $css );
$css = preg_replace( '/\s*([{};,>~])\s*/', '$1', $css );
$css = str_replace( ';}', '}', $css );
$css = trim( $css );
return strtr( $css, $keep );
}
/* ---------- JS ---------- */
/**
* Small inline scripts that only set classes on / (no-js -> js, mobile header
* breakpoints, dark mode) decide the first layout. Delaying them makes the page switch layout
* seconds later (bad Speed Index and layout shift), so they always run immediately.
*/
private static function is_layout_inline( $body ) {
if ( strlen( $body ) > 2500 ) {
return false;
}
if ( ! preg_match( '/document\.(?:body|documentElement)|querySelector\(\s*[\'"](?:html|body)[\'"]/', $body ) ) {
return false;
}
if ( ! preg_match( '/classList|className|setAttribute\(\s*[\'"](?:data-|class)/', $body ) ) {
return false;
}
// Anything that loads, tracks or depends on libraries is not a layout helper.
return ! preg_match( '/jQuery|\$\(|\bfetch\(|XMLHttpRequest|sendBeacon|gtag|dataLayer|fbq\(|_paq|createElement\(\s*[\'"](?:script|iframe|img)|\.src\s*=|innerHTML|document\.write|cookie/i', $body );
}
/* ---------- CSS delivery: critical CSS / remove unused CSS ---------- */
/** Resolves a link/script URL to [abs_url, local_path|false]. */
private static function resolve_local( $url ) {
$url = html_entity_decode( $url );
if ( preg_match( '/^\s*(data|javascript|vbscript):/i', $url ) ) {
return array( $url, false );
}
if ( '//' === substr( $url, 0, 2 ) ) {
$url = set_url_scheme( $url );
} elseif ( '/' === substr( $url, 0, 1 ) ) {
$p = wp_parse_url( home_url() );
if ( empty( $p['host'] ) ) {
return array( $url, false );
}
$url = ( isset( $p['scheme'] ) ? $p['scheme'] : 'https' ) . '://' . $p['host'] . ( isset( $p['port'] ) ? ':' . $p['port'] : '' ) . $url;
} elseif ( ! preg_match( '#^https?://#i', $url ) ) {
return array( $url, false );
}
$clean = strtok( $url, '?#' );
$path = self::url_to_path( $clean );
return array( $url, ( $path && is_readable( $path ) ) ? $path : false );
}
/* ---------- WebP ---------- */
public static function accepts_avif() {
return isset( $_SERVER['HTTP_ACCEPT'] ) && false !== strpos( sanitize_text_field( wp_unslash( $_SERVER['HTTP_ACCEPT'] ) ), 'image/avif' );
}
public static function accepts_webp() {
return isset( $_SERVER['HTTP_ACCEPT'] ) && false !== strpos( sanitize_text_field( wp_unslash( $_SERVER['HTTP_ACCEPT'] ) ), 'image/webp' );
}
private static function webp_cb( $m ) {
$tag = $m[0];
if ( false !== stripos( $tag, 'no-webp' ) ) {
return $tag;
}
$r = preg_replace_callback(
'/(?)?\#]*?\.(?:css|js|png|jpe?g|gif|svg|webp|avif|ico|woff2?|ttf|otf|eot|mp4|webm))#i';
$out = preg_replace_callback(
$re,
function () use ( $cdn ) {
return $cdn;
},
$html
);
return null === $out ? $html : $out;
}
/* ---------- lazy media ---------- */
private static function add_attr( $tag, $attr ) {
return preg_replace( '#(\s*/?>)$#', ' ' . $attr . '$1', $tag, 1 );
}
/** Adds width/height from the local file so the browser reserves space (lower CLS). */
private static function add_dimensions( $tag ) {
if ( preg_match( '/(? 0 && $info[1] > 0 ) ? array( (int) $info[0], (int) $info[1] ) : false;
}
if ( ! $cache[ $path ] ) {
return $tag;
}
return self::add_attr( $tag, 'width="' . $cache[ $path ][0] . '" height="' . $cache[ $path ][1] . '"' );
}
private static function img_cb( $m ) {
$tag = $m[0];
$s = self::$s;
++self::$img_count;
$n = self::$img_count;
if ( $s['img_dimensions'] ) {
$tag = self::add_dimensions( $tag );
}
// LCP: give the first large content image top priority and never lazy load it.
$eager = false;
if ( $s['lcp_priority'] && ! self::$lcp_done && $n <= 6 && false === stripos( $tag, 'logo' )
&& preg_match( '/(?= 300 ) {
self::$lcp_done = true;
$eager = true;
$tag = preg_replace( '/\sloading=(["\'])lazy\1/i', '', $tag );
if ( ! preg_match( '/(?, before it parses the body.
$attr = function ( $name ) use ( $tag ) {
return preg_match( '/(?)$#', ' loading="lazy"$1', $tag, 1 );
}
private static function youtube( $html ) {
$re = '#]*?(?]*>\s*#i';
return preg_replace_callback(
$re,
function ( $m ) {
if ( false !== stripos( $m[0], 'data-no-lazy' ) || false !== stripos( $m[0], 'autoplay=1' ) ) {
return $m[0];
}
self::$needs_yt = true;
$style = '';
if ( preg_match( '/(?'
. '
'
. '';
},
$html
);
}
/* ---------- HTML minify ---------- */
private static function html_minify( $html ) {
$out = preg_replace( '//s', '', $html );
if ( null === $out ) {
return $html;
}
$out = preg_replace( '/\s+/', ' ', $out );
return null === $out ? $html : $out;
}
}