84669 person learning
152542 person learning
20005 person learning
5487 person learning
7821 person learning
359900 person learning
3350 person learning
180660 person learning
48569 person learning
18603 person learning
40936 person learning
1549 person learning
1183 person learning
32909 person learning
如题目,若是有时需要在文件中增加内容,怎么保证写的东西不会被另一个人也打开在里面写?
我想的是写操作开始之前随便生成一个东西,操作完成之后,再把这东西给删除啦;
File Lock
<?php $fp = fopen("/tmp/lock.txt", "r+"); if (flock($fp, LOCK_EX)) { // 进行排它型锁定 ftruncate($fp, 0); // truncate file fwrite($fp, "Write something here\n"); fflush($fp); // flush output before releasing the lock flock($fp, LOCK_UN); // 释放锁定 } else { echo "Couldn't get the lock!"; } fclose($fp); ?>
From : http://php.net/manual/zh/func...
File Lock
From : http://php.net/manual/zh/func...