src/AbstractFile.php
protected function readLine(string $cacheFile): string
    {
        $fp = fopen($cacheFile, 'r');
        $line = fgets($fp);
        fclose($fp);

        return $line;
    }
protected function readLine(string $cacheFile): string
    {
        $fp = fopen($cacheFile, 'r');
        $line = fgets($fp);
        fclose($fp);

        return $line;
    }
protected function readLine ( string $ cacheFile ) : string { $ fp = fopen ( $ cacheFile , 'r' ) ; $ line = fgets ( $ fp ) ; fclose ( $ fp ) ; return $ line ; }
Read the first line of the cache file

@param string $cacheFile
@return string
Read the first line of the cache file