PHP fopen을 사용한 txt파일로 로그남기기

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$log_txt = $userid."|".$datetime."|".$data."|".$ip."|".$idx;
$log_dir = "/home/www/data/log"; 
$log_file = fopen($log_dir."/log.txt", "a");
fwrite($log_file, $log_txt."\r\n");
fclose($log_file);

References

https://ezcode.tistory.com/m/88