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php读取文件内容并清空文件

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Release： 2016-07-25 08:53:44
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  3. //读取文件内容

  4. $fh = fopen($path, "r+");

  5. if( flock($fh, lock_ex) ){//加写锁

  6. $old_content=json_decode(fread($fh,filesize($path)),true);

  7. $old_content=$old_content.$new_content;

  8. ftruncate($fh,0); // 将文件截断到给定的长度
  9. rewind($fh); // 倒回文件指针的位置
  10. fwrite($fh,json_encode($old_content));
  11. // @chmod($path,0644);
  12. flock($fh, lock_un); //解锁

  13. }

  14. fclose($fh);
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