php怎么写日志？php实现的简单日志写入函数

functionlog($logthis){

file_put_contents('logfile.log',date("Y-m-d H:i:s")." ".$logthis."rn", FILE_APPEND | LOCK_EX);

}

// use rn for new line on windows, just n on linux

// PHP_EOL cross platform solution for new line

// // so better to use this

functionlog($logthis){

file_put_contents('logfile.log',date("Y-m-d H:i:s")." ".$logthis.PHP_EOL, FILE_APPEND | LOCK_EX);

}