422      * @param  string    $class The name of the class
425     public function loadClass($class)  argument
427         if ($file = $this->findFile($class)) {
439      * @param string $class The name of the class
443     public function findFile($class)  argument
446         if (isset($this->classMap[$class])) {
447             return $this->classMap[$class];
449         if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) {
453             $file = apcu_fetch($this->apcuPrefix.$class, $hit);
459         $file = $this->findFileWithExtension($class, '.php');
463             $file = $this->findFileWithExtension($class, '.hh');
467             apcu_add($this->apcuPrefix.$class, $file);
472             $this->missingClasses[$class] = true;
489      * @param  string       $class
493     private function findFileWithExtension($class, $ext)  argument
496         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
498         $first = $class[0];
500             $subPath = $class;
523         if (false !== $pos = strrpos($class, '\\')) {
529             $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext;
534                 if (0 === strpos($class, $prefix)) {