original_string: protected function check_ttl() {
          if ($this->ttl === 0) {
              return 0;
          }
          $maxtime = cache::now() - $this->ttl;
          $count = 0;
          for ($value = reset($this->store); $value !== false; $value = next($this->store)) {
              if ($value[1] >= $maxtime) {
                  // We know that elements are sorted by ttl so no need to continue.
                  break;
              }
              $count++;
          }
          if ($count) {
              // Remove first $count elements as they are expired.
              $this->store = array_slice($this->store, $count, null, true);
              if ($this->maxsize !== false) {
                  $this->storecount -= $count;
              }
          }
          return $count;
      }
code: protected function check_ttl() {
          if ($this->ttl === 0) {
              return 0;
          }
          $maxtime = cache::now() - $this->ttl;
          $count = 0;
          for ($value = reset($this->store); $value !== false; $value = next($this->store)) {
              if ($value[1] >= $maxtime) {
                  // We know that elements are sorted by ttl so no need to continue.
                  break;
              }
              $count++;
          }
          if ($count) {
              // Remove first $count elements as they are expired.
              $this->store = array_slice($this->store, $count, null, true);
              if ($this->maxsize !== false) {
                  $this->storecount -= $count;
              }
          }
          return $count;
      }
code_tokens: protected function check_ttl ( ) { if ( $ this -> ttl === 0 ) { return 0 ; } $ maxtime = cache :: now ( ) - $ this -> ttl ; $ count = 0 ; for ( $ value = reset ( $ this -> store ) ; $ value !== false ; $ value = next ( $ this -> store ) ) { if ( $ value [ 1 ] >= $ maxtime ) { // We know that elements are sorted by ttl so no need to continue. break ; } $ count ++ ; } if ( $ count ) { // Remove first $count elements as they are expired. $ this -> store = array_slice ( $ this -> store , $ count , null , true ) ; if ( $ this -> maxsize !== false ) { $ this -> storecount -= $ count ; } } return $ count ; }
docstring: Removes expired elements.
  @return int number of removed elements
docstring_tokens: Removes expired elements .