WPLib::is_found PHP Method

    static function is_found($filepath)
    {
        return self::invoke_with_args('is_found', $filepath);
    }

 /**
  * Load 7 char abbreviated hash for commit from the system (file or exec).
  *
  * Look for a file RECENT_COMMIT if a Git post-commit hook exists and created it
  * otherwise call Git using shell_exec().
  *
  * @param string $class_name
  *
  * @return null
  */
 static function load_recent_commit($class_name)
 {
     $filepath = self::_get_recent_commit_file($class_name);
     $recent_commit = WPLib::is_found($filepath) ? trim(WPLib::get_contents($filepath)) : null;
     if (is_null($recent_commit) && WPLib::is_development()) {
         /**
          * Call `git log` via exec()
          */
         $root_dir = self::_get_class_root_dir($class_name);
         $command = "cd {$root_dir} && git log -1 --oneline && cd -";
         exec($command, $output, $return_value);
         if (0 === $return_value && isset($output[0])) {
             /**
              * If no git repo in dir, $return_value==127 and $output==array()
              * If no git on system, $return_value==128 and $output==array()
              * If good, first 7 chars of $output[0] has abbreviated hash for commit
              */
             $recent_commit = substr($output[0], 0, 7);
         }
     }
     return $recent_commit;
 }