Example of php multi-threading reading and writing the same file

A piece of code that simulates multi-threaded file processing in PHP programming to implement file read-write locking and unlocking functions. Friends in need can refer to it.

The sample code is as follows:

<?php
/**
 * php多线程读写同一文件的代码
 * site bbs.it-home.org
*/
function T_put($filename,$string){
   $fp = fopen($filename,’a');   //追加方式打开
   if (flock($fp, LOCK_EX)){      //加写锁
       fputs($fp,$string);        //写文件
       flock($fp, LOCK_UN);       //解锁
   }
   fclose($fp);
}
function T_get($filename,$length){
   $fp = fopen($filename,’r');   //追加方式打开
   if (flock($fp, LOCK_SH)){      //加读锁
       $result = fgets($fp,$length);        //读取文件
       flock($fp, LOCK_UN);       //解锁
   }
   fclose($fp);
   return $result;
}
?>