php文件锁解决少量并发问题
阻塞(等待)模式:
<?php $fp = fopen("lock.txt", "r"); if(flock($fp,LOCK_EX)) { //..处理订单 flock($fp,LOCK_UN); } fclose($fp); ?>
非阻塞模式:
<?php $fp = fopen("lock.txt", "r"); if(flock($fp,LOCK_EX | LOCK_NB)) { //..处理订单 flock($fp,LOCK_UN); } else { echo "系统繁忙,请稍后再试"; } fclose($fp); ?>