smarty/libs/core/core.write_file.php

<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */

/**
 * write out a file to disk
 *
 * @param string $filename
 * @param string $contents
 * @param boolean $create_dirs
 * @return boolean
 */    
function smarty_core_write_file($params, &$this)
{
	$_dirname = dirname($params['filename']);

    if ($params['create_dirs']) {
		$_params = array('dir' => $_dirname);
		require_once(SMARTY_DIR . 'core' . DIRECTORY_SEPARATOR . 'core.create_dir_structure.php');
		smarty_core_create_dir_structure($_params, $this);
	}

	// write to tmp file, then rename it to avoid
	// file locking race condition
	$_tmp_file = $_dirname . DIRECTORY_SEPARATOR . uniqid('');

    if (!($fd = @fopen($_tmp_file, 'w'))) {
        $this->trigger_error("problem writing temporary file '$_tmp_file'");
        return false;
    }

    fwrite($fd, $params['contents']);
    fclose($fd);
	if(file_exists($params['filename'])) {
		@unlink($params['filename']);
	} 
	@rename($_tmp_file, $params['filename']);
    chmod($params['filename'], $this->_file_perms);

    return true;
}

/* vim: set expandtab: */

?>