php 时间格式化

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');
?>

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();

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