函数名：date_format
参数： $string 时间源，可以是2006-04-24 09:56:07这种格式，$format要格式化的形式，如%Y年%m月%d日%H时%M分%S秒看需要删改
示例：

<?php
echo date_format($rs[\'time\'],\'%Y年%m月%d日%H时%M分%S秒\');
?>
以下是PHP代码：【复制】 function date_format($string, $format="%b %e, %Y", $default_date=null)
{
if (substr(PHP_OS,0,3) == \'WIN\') {
$_win_from = array (\'%e\', \'%T\', \'%D\');
$_win_to = array (\'%#d\', \'%H:%M:%S\', \'%m/%d/%y\');
$format = str_replace($_win_from, $_win_to, $format);
}
if($string != \'\') {
return strftime($format, smarty_make_timestamp($string));
} elseif (isset($default_date) && $default_date != \'\') {
return strftime($format, smarty_make_timestamp($default_date));
} else {
return;
}
}

function smarty_make_timestamp($string)
{
if(empty($string)) {
$string = "now";
}
$time = strtotime($string);
if (is_numeric($time) && $time != -1)
return $time;

// is mysql timestamp format of YYYYMMDDHHMMSS?
if (PReg_match(\'/^d{14}$/\', $string)) {
$time = mktime(substr($string,8,2),substr($string,10,2),substr($string,12,2),
substr($string,4,2),substr($string,6,2),substr($string,0,4));

return $time;
}

// couldn\'t recognize it, try to return a time
$time = (int) $string;
if ($time > 0)
return $time;
else
return time();
}