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 $smarty    smarty instance
24:      *
25:      * @throws SmartyException
26:      * @return boolean true
27:      */
28:     public static function writeFile($_filepath, $_contents, Smarty $smarty)
29:     {
30:         $_error_reporting = error_reporting();
31:         error_reporting($_error_reporting & ~E_NOTICE & ~E_WARNING);
32:         if ($smarty->_file_perms !== null) {
33:             $old_umask = umask(0);
34:         }
35: 
36:         $_dirpath = dirname($_filepath);
37:         // if subdirs, create dir structure
38:         if ($_dirpath !== '.' && !file_exists($_dirpath)) {
39:             mkdir($_dirpath, $smarty->_dir_perms === null ? 0777 : $smarty->_dir_perms, true);
40:         }
41: 
42:         // write to tmp file, then move to overt file lock race condition
43:         $_tmp_file = $_dirpath . DS . str_replace(array('.', ','), '_', uniqid('wrt', true));
44:         if (!file_put_contents($_tmp_file, $_contents)) {
45:             error_reporting($_error_reporting);
46:             throw new SmartyException("unable to write file {$_tmp_file}");
47:        }
48: 
49:         /*
50:          * Windows' rename() fails if the destination exists,
51:          * Linux' rename() properly handles the overwrite.
52:          * Simply unlink()ing a file might cause other processes
53:          * currently reading that file to fail, but linux' rename()
54:          * seems to be smart enough to handle that for us.
55:          */
56:         if (Smarty::$_IS_WINDOWS) {
57:             // remove original file
58:             @unlink($_filepath);
59:             // rename tmp file
60:             $success = @rename($_tmp_file, $_filepath);
61:         } else {
62:             // rename tmp file
63:             $success = @rename($_tmp_file, $_filepath);
64:             if (!$success) {
65:                 // remove original file
66:                 @unlink($_filepath);
67:                 // rename tmp file
68:                 $success = @rename($_tmp_file, $_filepath);
69:             }
70:         }
71: 
72:         if (!$success) {
73:             error_reporting($_error_reporting);
74:             throw new SmartyException("unable to write file {$_filepath}");
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: 
84:         return true;
85:     }
86: }
87: