PHP uses multiple processes to control file reading and writing at the same time_PHP tutorial

复制代码 代码如下:

/**
* Write data
* @param [string] $path [file path]
* @param [string] $mode [file open mode]
* @param [string] $data [ Data]
* @return [bool] 
*/
function writeData($path, $mode, $data){
       $fp = fopen($path, $mode);
       $retries = 0;
       $max_retries = 100;
       do {
        if ($retries > 0) {
         usleep(rand(1, 10000));
        }
        $retries += 1;
       }while (!flock($fp, LOCK_EX) and $retries <= $max_retries);
       if ($retries == $max_retries) {
        return false;
       }
       fwrite($fp, $data."rn");
       flock($fp, LOCK_UN);
       fclose($fp);
       return true;
}

/**
* Read data
* @param [string] $path [file path]
* @param [string] $mode [file open mode]
* @return string
*/
function readData($path,$mode){
     $fp = fopen($path, $mode);
     $retries = 0;
     $max_retries = 100;
     do {
      if ($retries > 0) {
       usleep(rand(1, 10000));
      }
      $retries += 1;
     }while (!flock($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+','this is a demo');
echo readData('D:/webServer','r+');

http://www.bkjia.com/PHPjc/736838.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/736838.htmlTechArticle复制代码 代码如下: ?php /** * 写入数据 * @param [string] $path [文件路径] * @param [string] $mode [文件打开模式] * @param [string] $data [数据] * @return [b...