smarty/internals/core.write_file.php
author Dan
Wed, 24 Sep 2008 13:47:42 -0400
changeset 54 6d8b9497e44b
parent 0 c63de9eb7045
permissions -rw-r--r--
Added check for PHP 5.1.0 and improved error handling for missing pcntl
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<?php
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/**
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 * Smarty plugin
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 * @package Smarty
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 * @subpackage plugins
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 */
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/**
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 * write out a file to disk
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 *
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 * @param string $filename
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 * @param string $contents
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 * @param boolean $create_dirs
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 * @return boolean
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 */
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function smarty_core_write_file($params, &$smarty)
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{
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    $_dirname = dirname($params['filename']);
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    if ($params['create_dirs']) {
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        $_params = array('dir' => $_dirname);
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        require_once(SMARTY_CORE_DIR . 'core.create_dir_structure.php');
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        smarty_core_create_dir_structure($_params, $smarty);
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    }
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    // write to tmp file, then rename it to avoid file locking race condition
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    $_tmp_file = tempnam($_dirname, 'wrt');
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    if (!($fd = @fopen($_tmp_file, 'wb'))) {
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        $_tmp_file = $_dirname . DIRECTORY_SEPARATOR . uniqid('wrt');
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        if (!($fd = @fopen($_tmp_file, 'wb'))) {
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            $smarty->trigger_error("problem writing temporary file '$_tmp_file'");
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            return false;
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        }
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    }
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    fwrite($fd, $params['contents']);
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    fclose($fd);
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    if (DIRECTORY_SEPARATOR == '\\' || !@rename($_tmp_file, $params['filename'])) {
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        // On platforms and filesystems that cannot overwrite with rename() 
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        // delete the file before renaming it -- because windows always suffers
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        // this, it is short-circuited to avoid the initial rename() attempt
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        @unlink($params['filename']);
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        @rename($_tmp_file, $params['filename']);
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    }
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    @chmod($params['filename'], $smarty->_file_perms);
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    return true;
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}
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/* vim: set expandtab: */
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?>