library/Smarty/libs/sysplugins/smarty_internal_write_file.php

   1 <?php
   2 /**
   3  * Smarty write file plugin
   4  *
   5  * @package Smarty
   6  * @subpackage PluginsInternal
   7  * @author Monte Ohrt
   8  */
   9
  10 /**
  11  * Smarty Internal Write File Class
  12  *
  13  * @package Smarty
  14  * @subpackage PluginsInternal
  15  */
  16 class Smarty_Internal_Write_File {
  17
  18     /**
  19      * Writes file in a safe way to disk
  20      *
  21      * @param string $_filepath complete filepath
  22      * @param string $_contents file content
  23      * @param Smarty $smarty    smarty instance
  24      * @return boolean true
  25      */
  26     public static function writeFile($_filepath, $_contents, Smarty $smarty)
  27     {
  28         $_error_reporting = error_reporting();
  29         error_reporting($_error_reporting & ~E_NOTICE & ~E_WARNING);
  30         if ($smarty->_file_perms !== null) {
  31             $old_umask = umask(0);
  32         }
  33
  34         $_dirpath = dirname($_filepath);
  35         // if subdirs, create dir structure
  36         if ($_dirpath !== '.' && !file_exists($_dirpath)) {
  37             mkdir($_dirpath, $smarty->_dir_perms === null ? 0777 : $smarty->_dir_perms, true);
  38         }
  39
  40         // write to tmp file, then move to overt file lock race condition
  41         $_tmp_file = $_dirpath . DS . uniqid('wrt', true);
  42         if (!file_put_contents($_tmp_file, $_contents)) {
  43             error_reporting($_error_reporting);
  44             throw new SmartyException("unable to write file {$_tmp_file}");
  45             return false;
  46         }
  47
  48         /*
  49          * Windows' rename() fails if the destination exists,
  50          * Linux' rename() properly handles the overwrite.
  51          * Simply unlink()ing a file might cause other processes
  52          * currently reading that file to fail, but linux' rename()
  53          * seems to be smart enough to handle that for us.
  54          */
  55         if (Smarty::$_IS_WINDOWS) {
  56             // remove original file
  57             @unlink($_filepath);
  58             // rename tmp file
  59             $success = @rename($_tmp_file, $_filepath);
  60         } else {
  61             // rename tmp file
  62             $success = @rename($_tmp_file, $_filepath);
  63             if (!$success) {
  64                 // remove original file
  65                 @unlink($_filepath);
  66                 // rename tmp file
  67                 $success = @rename($_tmp_file, $_filepath);
  68             }
  69         }
  70
  71         if (!$success) {
  72             error_reporting($_error_reporting);
  73             throw new SmartyException("unable to write file {$_filepath}");
  74             return false;
  75         }
  76
  77         if ($smarty->_file_perms !== null) {
  78             // set file permissions
  79             chmod($_filepath, $smarty->_file_perms);
  80             umask($old_umask);
  81         }
  82         error_reporting($_error_reporting);
  83         return true;
  84     }
  85
  86 }
  87
  88 ?>