src/Output/AssetWriter.php
protected function _readTimestamp()
    {
        $data = array();
        if (empty($data) && file_exists($this->path . static::BUILD_TIME_FILE)) {
            $data = file_get_contents($this->path . static::BUILD_TIME_FILE);
            if ($data) {
                $data = unserialize($data);
            }
        }
        return $data;
    }
protected function _readTimestamp()
    {
        $data = array();
        if (empty($data) && file_exists($this->path . static::BUILD_TIME_FILE)) {
            $data = file_get_contents($this->path . static::BUILD_TIME_FILE);
            if ($data) {
                $data = unserialize($data);
            }
        }
        return $data;
    }
protected function _readTimestamp ( ) { $ data = array ( ) ; if ( empty ( $ data ) && file_exists ( $ this -> path . static :: BUILD_TIME_FILE ) ) { $ data = file_get_contents ( $ this -> path . static :: BUILD_TIME_FILE ) ; if ( $ data ) { $ data = unserialize ( $ data ) ; } } return $ data ; }
Read timestamps from either the fast cache, or the serialized file.

@return array An array of timestamps for build files.
Read timestamps from either the fast cache or the serialized file .