PHP lessc::unregisterFunction方法代码示例

 /**
  * Lessify the stylesheet and return the href of the compiled file
  *
  * @param  string $src    Source URL of the file to be parsed
  * @param  string $handle An identifier for the file used to create the file name in the cache
  * @return string         URL of the compiled stylesheet
  */
 public function parse_stylesheet($src, $handle)
 {
     // we only want to handle .less files
     if (!preg_match('/\\.less(\\.php)?$/', preg_replace('/\\?.*$/', '', $src))) {
         return $src;
     }
     // get file path from $src
     if (!strstr($src, '?')) {
         $src .= '?';
     }
     // prevent non-existent index warning when using list() & explode()
     // Match the URL schemes between WP_CONTENT_URL and $src,
     // so the str_replace further down will work
     $src_scheme = parse_url($src, PHP_URL_SCHEME);
     $wp_content_url_scheme = parse_url(WP_CONTENT_URL, PHP_URL_SCHEME);
     if ($src_scheme != $wp_content_url_scheme) {
         $src = set_url_scheme($src, $wp_content_url_scheme);
     }
     list($less_path, $query_string) = explode('?', str_replace(WP_CONTENT_URL, WP_CONTENT_DIR, $src));
     // output css file name
     $css_path = trailingslashit($this->get_cache_dir()) . "{$handle}.css";
     // automatically regenerate files if source's modified time has changed or vars have changed
     try {
         // initialise the parser
         $less = new lessc();
         // load the cache
         $cache_path = "{$css_path}.cache";
         if (file_exists($cache_path)) {
             $cache = unserialize(file_get_contents($cache_path));
         }
         // vars to pass into the compiler - default @themeurl var for image urls etc...
         $this->vars['themeurl'] = '~"' . get_stylesheet_directory_uri() . '"';
         $this->vars['lessurl'] = '~"' . dirname($src) . '"';
         $this->vars = apply_filters('less_vars', $this->vars, $handle);
         // If the cache or root path in it are invalid then regenerate
         if (empty($cache) || empty($cache['less']['root']) || !file_exists($cache['less']['root'])) {
             $cache = array('vars' => $this->vars, 'less' => $less_path);
         }
         // less config
         $less->setFormatter(apply_filters('less_compression', $this->compression));
         $less->setPreserveComments(apply_filters('less_preserve_comments', $this->preserve_comments));
         $less->setVariables($this->vars);
         // add directories to scan for imports
         $import_dirs = apply_filters('less_import_dirs', $this->import_dirs);
         if (!empty($import_dirs)) {
             foreach ((array) $import_dirs as $dir) {
                 $less->addImportDir($dir);
             }
         }
         // register and unregister functions
         foreach ($this->registered_functions as $name => $callable) {
             $less->registerFunction($name, $callable);
         }
         foreach ($this->unregistered_functions as $name) {
             $less->unregisterFunction($name);
         }
         // allow devs to mess around with the less object configuration
         do_action_ref_array('lessc', array(&$less));
         // $less->cachedCompile only checks for changed file modification times
         // if using the theme customiser (changed variables not files) then force a compile
         if ($this->vars !== $cache['vars']) {
             $force = true;
         } else {
             $force = false;
         }
         $less_cache = $less->cachedCompile($cache['less'], apply_filters('less_force_compile', $force));
         if (empty($cache) || empty($cache['less']['updated']) || $less_cache['updated'] > $cache['less']['updated'] || $this->vars !== $cache['vars']) {
             file_put_contents($cache_path, serialize(array('vars' => $this->vars, 'less' => $less_cache)));
             file_put_contents($css_path, $less_cache['compiled']);
         }
     } catch (exception $ex) {
         wp_die($ex->getMessage());
     }
     // restore query string it had if any
     $url = trailingslashit($this->get_cache_dir(false)) . "{$handle}.css" . (!empty($query_string) ? "?{$query_string}" : '');
     // restore original url scheme
     $url = set_url_scheme($url, $src_scheme);
     return add_query_arg('ver', $less_cache['updated'], $url);
 }

 /**
  * Lessify the stylesheet and return the href of the compiled file
  *
  * @param  string $src    Source URL of the file to be parsed
  * @param  string $handle An identifier for the file used to create the file name in the cache
  * @return string         URL of the compiled stylesheet
  */
 public function parse_stylesheet($src, $handle)
 {
     // we only want to handle .less files
     if (!preg_match('/\\.less(\\.php)?$/', preg_replace('/\\?.*$/', '', $src))) {
         return $src;
     }
     // get file path from $src
     if (!strstr($src, '?')) {
         $src .= '?';
     }
     // prevent non-existent index warning when using list() & explode()
     // Match the URL schemes between WP_CONTENT_URL and $src,
     // so the str_replace further down will work
     $src_scheme = parse_url($src, PHP_URL_SCHEME);
     $wp_content_url_scheme = parse_url(WP_CONTENT_URL, PHP_URL_SCHEME);
     if ($src_scheme != $wp_content_url_scheme) {
         $src = set_url_scheme($src, $wp_content_url_scheme);
     }
     list($less_path, $query_string) = explode('?', str_replace(WP_CONTENT_URL, WP_CONTENT_DIR, $src));
     $cache = $this->get_cached_file_data($handle);
     // vars to pass into the compiler - default @themeurl var for image urls etc...
     $this->vars['themeurl'] = '~"' . get_stylesheet_directory_uri() . '"';
     $this->vars['lessurl'] = '~"' . dirname($src) . '"';
     $this->vars = apply_filters('less_vars', $this->vars, $handle);
     // The overall "version" of the LESS file is all it's vars, src etc.
     $less_version = md5(serialize(array($this->vars, $src)));
     /**
      * Give the ability to disable always compiling the LESS with lessc()
      * and instead just use the $vars and $version of the LESS file to
      * dictate whether the LESS should be (re)generated.
      *
      * This means we don't need to run everything through the lessc() compiler
      * on every page load. The tradeoff is making a change in a LESS file will not
      * necessarily cause a (re)generation, one would need to bump the $ver param
      * on wp_enqueue_script() to cause that.
      */
     if (!get_option('wp_less_always_compile_less', true)) {
         if (!empty($cache['version']) && $cache['version'] === $less_version) {
             // restore query string it had if any
             $url = $cache['url'] . (!empty($query_string) ? "?{$query_string}" : '');
             $url = set_url_scheme($url, $src_scheme);
             return add_query_arg('ver', $less_version, $url);
         }
     }
     // automatically regenerate files if source's modified time has changed or vars have changed
     try {
         // initialise the parser
         if (!class_exists('lessc')) {
             return $url;
             //wp_die( 'the lessphp library is missing, aborting, run composer update' );
         }
         // If the cache or root path in it are invalid then regenerate
         if (empty($cache) || empty($cache['less']['root']) || !file_exists($cache['less']['root'])) {
             $cache = array('vars' => $this->vars, 'less' => $less_path);
         }
         if (empty($cache['url'])) {
             $cache['url'] = trailingslashit($this->get_cache_dir(false)) . "{$handle}.css";
         }
         // less config
         $less = new lessc();
         $less->setFormatter(apply_filters('less_compression', $this->compression));
         $less->setPreserveComments(apply_filters('less_preserve_comments', $this->preserve_comments));
         $less->setVariables($this->vars);
         // add directories to scan for imports
         $import_dirs = apply_filters('less_import_dirs', $this->import_dirs);
         if (!empty($import_dirs)) {
             foreach ((array) $import_dirs as $dir) {
                 $less->addImportDir($dir);
             }
         }
         // register and unregister functions
         foreach ($this->registered_functions as $name => $callable) {
             $less->registerFunction($name, $callable);
         }
         foreach ($this->unregistered_functions as $name) {
             $less->unregisterFunction($name);
         }
         // allow devs to mess around with the less object configuration
         do_action_ref_array('lessc', array(&$less));
         // $less->cachedCompile only checks for changed file modification times
         // if using the theme customiser (changed variables not files) then force a compile
         if ($this->vars !== $cache['vars']) {
             $force = true;
         } else {
             $force = false;
         }
         $force = apply_filters('less_force_compile', $force);
         $less_cache = $less->cachedCompile($cache['less'], $force);
         // if they have the same values but differing order, they wont match
         //sort( $cache['less'] );
         //sort( $less_cache );
         if (empty($cache) || empty($cache['less']['updated']) || md5($less_cache['compiled']) !== md5($cache['less']['compiled']) || $this->vars !== $cache['vars']) {
             // output css file name
//.........这里部分代码省略.........