PHP uses multiple processes to simultaneously control file read and write samples

  This article mainly introduces PHP to use multiple processes to control file read and write examples, need friends can refer to the following

The code is as follows: <?php/**  * Write Data  * @param  [string] $path [File path]  * @param  [string] $mode [File open mode] & nbsp;* @param  [string] $data [data]  * @return [bool]         */function WriteData ($pat H, $mode, $data) {        $fp = fopen ($path, $mode);         $retries = 0;   &N Bsp     $max _retries = 100;        do {       -($retries > 0) {         uslee P (rand (1, 10000));        }         $retries + 1;        }while (!flock ($FP, LOCK_EX) and $retries <= $max _retries);        if ($retries = = $max _retries) {        return false;       &NBSP}        fwrite ($fp, $data. " RN ");        flock ($fp, Lock_un);        fclose ($FP);       &Nbsp;return true;    /**  * read data  * @param  [string] $path [File path]  * @param  [string] $mode [File open mode] &n bsp;* @return string        */function ReadData ($path, $mode) {      $fp = fopen ($path, $mode);       $retries = 0;       $max _retries = 100;      do {      if ($retries > 0) {       usleep (rand (1, 10000)); &N Bsp    }       $retries + 1;      }while (!flock ($FP, lock_sh) and $retries <= $max _retries);      if ($retries = = $max _retries) {      return false;      }       $contents = "";      while (!feof ($fp)) {        $contents. = Fread ($fp, 8192);            flock ($fp, Lock_un);      fclose ($FP);      return $contents; }   writedATA (' D:/webserver/demo.txt ', ' A + ', ' is a demo '); echo readdata (' D:/webserver ', ' r+ ');