php 简单日志记录 log文件

//日志记录
function writeFile($data,$type=‘a‘){
???$filename = ?date("Ymd").".log";
???$handle =@ fopen($filename, $type);
???flock($handle, LOCK_EX);
???ob_start();
???echo "\n" . "[SQL]" . "\n";
???print_r ($data);
???$string = ?ob_get_contents();
???ob_end_clean();
???$fettle = @fwrite($handle, $string);
???fclose($handle);
???@chmod($filename,0777);
}

//接口用

 writeFile($sql);