View file smarty/sysplugins/smarty_internal_write_file.php

<?php

/**
* Smarty write file plugin
* 
* @package Smarty
* @subpackage PluginsInternal
* @author Monte Ohrt 
*/
/**
* Smarty Internal Write File Class
*/
class Smarty_Internal_Write_File {
    /**
    * Writes file in a save way to disk
    * 
    * @param string $_filepath complete filepath
    * @param string $_contents file content
    * @return boolean true
    */
    public static function writeFile($_filepath, $_contents, $smarty)
    {
        $old_umask = umask(0);
        $_dirpath = dirname($_filepath); 
        // if subdirs, create dir structure
        if ($_dirpath !== '.' && !file_exists($_dirpath)) {
            mkdir($_dirpath, $smarty->_dir_perms, true);
        } 
        // write to tmp file, then move to overt file lock race condition
        $_tmp_file = tempnam($_dirpath, 'wrt');

        if (!file_put_contents($_tmp_file, $_contents)) {
            umask($old_umask);
            throw new Exception("unable to write file {$_tmp_file}");
            return false;
        } 
        // remove original file
        if (file_exists($_filepath))
            @unlink($_filepath); 
        // rename tmp file
        rename($_tmp_file, $_filepath); 
        // set file permissions
        chmod($_filepath, $smarty->_file_perms);
        umask($old_umask);
        return true;
    } 
} 

?>