php实现的简单日志写入函数

function log( $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
function log( $logthis ){
file_put_contents('logfile.log', date("y-m-d h:i:s"). " " . $logthis.php_eol, file_append | lock_ex);
}