问题描述
如何在 SMARTY 模板引擎中计算两个日期之间的差异并找到天数?我知道应该完成的逻辑部分是 PHP 并将值分配给 SMARTY。但有时我们会遇到无论如何都必须执行相反操作的情况。即使它违背了使用模板引擎的逻辑,我也必须在 smarty 中计算这种差异。
这是我的代码:
function returnReferrals($type){
global $pdo;
$stmt = $pdo->prepare("SELECT * FROM referrals
LEFT JOIN members ON members.mem_id = referrals.ref_referral
WHERE ref_type = :type AND ref_referrer = :mem");
$stmt-> bindValue(':type',$type);
$stmt-> bindValue(':mem',userId());
$stmt-> execute();
$res = array();
while($result = $stmt->fetch()){
$res[] = $result;
}
return $res;
}
$referrals = returnReferrals($type);
$smarty->assign('referrals',$referrals);
推荐.tpl
{foreach $referrals as $refs}
<!-- Here I need to calculate days difference and have logic like below -->
{if $days > 2}Inactive{else}Active{/if}
{/foreach}
现在要获得 $days
,我需要计算两个日期之间的差异,其中一个日期来自数据库 datetime
字段 $refs.ref_last_click
,另一个是当前日期。如果在 PHP 中可以,我可以轻松地做到这一点,但由于我已将循环变量分配给要在 foreach 循环中使用的模板,因此我现在必须在 SMARTY 中执行此操作。我该怎么做?
解决方法
这是我的 smarty 函数(添加到您的 smarty 插件目录):
/*
* Smarty plugin
* -------------------------------------------------------------
* Type: function
* Name: date_diff
* Purpose: factor difference between two dates in days,weeks,or years
* Input: d1 = "mm/dd/yyyy" or "yyyy/mm/dd" or "yyyy-mm-dd"
* d2 = "mm/dd/yyyy" or "yyyy/mm/dd" or "yyyy-mm-dd" or $smarty.now
* assign = name of variable to assign difference to
* interval = "days" (default),"weeks","years"
* Examples: {date_diff d1="2020-01-20"}
* Examples: {date_diff d1="2020-01-20" d2=2020-02-10 interval="weeks"}
* Examples: {date_diff d1="2020-01-20" d2=2020-02-10 assign="variable_diff"} result: {$variable_diff}
* -------------------------------------------------------------
*/
function smarty_function_date_diff($params,&$smarty)
{
$d1 = isset($params['d1']) ? $params['d1'] : date('Y-m-d');
$d2 = isset($params['d2']) ? $params['d2'] : date('Y-m-d');
$assign_name = isset($params['assign']) ? $params['assign'] : '';
$date1 = strtotime($d1);
$date2 = strtotime($d2);
// use current for empty string
if (! $date1) {
$date1 = date('Y-m-d');
}
if (! $date2) {
$date2 = date('Y-m-d');
}
$interval = isset($params['interval']) ? $params['interval'] : 'days';
// diff in days
$diff = ($date2 - $date1) / 60 / 60 / 24;
if ($interval === "weeks") {
$diff /= 7;
}
elseif ($interval === "years") {
$diff /= 365.25;
}
$diff = floor($diff);
if ($assign_name) {
$smarty->assign($assign_name,$diff);
}
else {
return $diff;
}
}
然后你的代码:
{foreach $referrals as $refs}
{date_diff d1=$refs.ref_last_click assign='days'}
{* 'd2' will appear as default current time *}
{if $days > 2}Inactive{else}Active{/if}
{/foreach}