php 如何在不显示的情况下增加 smarty 中分配的变量
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How do you increment an assigned variable in smarty without displaying it
提问by Francis Lewis
So I have an assigned variable in smarty:
所以我在 smarty 中分配了一个变量：
{assign var=number value=0}
Now I can increment it using
现在我可以使用增加它
{$number++}
or
或者
{++$number}
Which is exactly what I need, only problem is, it displays the value of $number on the page. Is there a way I can increment the value but not display it?
这正是我需要的，唯一的问题是，它在页面上显示 $number 的值。有没有办法可以增加值但不显示它？
This is not used inside of a loop otherwise I would use something like iteration or index.
这不在循环内使用，否则我会使用迭代或索引之类的东西。
回答by Cyclonecode
You could do this:
你可以这样做：
{assign var=val value=1}
{assign var=val value=$val+1}
{$val} // displays 2
The above will be compiled to:
以上将被编译为：
$this->assign('val', 1);
$this->assign('val', $this->_tpl_vars['val']+1);
echo $this->_tpl_vars['val'];
or
或者
{assign var=var value=1}
{capture assign=var}{$var+1}{/capture}
{$var} // displays 2
Which in turn will be compiled as:
依次编译为：
$this->assign('var', 1);
ob_start();
echo $this->_tpl_vars['var']+1;
$this->_smarty_vars['capture']['default'] = ob_get_contents();
$this->assign('var', ob_get_contents());
ob_end_clean();
echo $this->_tpl_vars['var'];
another approach would be to write a small plugin:
另一种方法是编写一个小插件：
// plugins/function.inc.php
function smarty_function_inc($params, Smarty &$smarty)
{
$params['step'] = empty($params['step']) ? 1 : intval($params['step']);
if (empty($params['var'])) {
trigger_error("inc: missing 'var' parameter");
return;
}
if (!in_array($params['var'], array_keys($smarty->_tpl_vars))) {
trigger_error("inc: trying to increment unassigned variable ".$params['var']);
return;
}
if (isset($smarty->_tpl_vars[$params['var']])) {
$smarty->assign($params['var'],
$smarty->_tpl_vars[$params['var']] + $params['step']);
}
}
The function would then be called like this, notice that stepis optional and if not given the variable will be incremented by one:
然后将像这样调用该函数，注意它step是可选的，如果没有给出，变量将增加 1：
{assign var=var value=0}
{inc var=var step=2}
{$var} // displays 2
Reference
Smarty {assign}
Smarty {capture}
Extending Smarty With Plugins
回答by trapper
It's cleaner just to do it like this...
这样做更干净......
{$number = $number +1}
回答by huncyrus
Better to use the built in Smarty "counter" >> {counter}element.
最好使用内置的 Smarty“计数器”>>{counter}元素。
So, in template you can use:
因此，在模板中您可以使用：
<div>Some text, html code, whatever... </div>
{* init the counter! *}
{counter start=0 print=false} {* now the tpl doesn't show the "0" number *}
{* 3x run :D *}
{some_cyclic_stuff_like_foreach_or_section}
Run the counter: {counter}
{/some_cyclic_stuff_like_foreach_or_section}
It will print for you:
它将为您打印：
Run the counter: 1
Run the counter: 2
Run the counter: 3
So, at least, you can use it with the print=falseoption, and you have the counter but it's hidden.
因此，至少，您可以将它与print=false选项一起使用，并且您拥有计数器但它是隐藏的。
If you use it the "variable way" (like the upper section write) you also can hide it with html/css or just simply don't let it print :)
如果您以“可变方式”使用它（如上部分写入），您也可以使用 html/css 隐藏它，或者只是不让它打印:)
回答by ridecar2
If I had to do this I would do something like the following: {php}$number++{/php}but it is very ugly to have to use php in a smarty template. This might suggest that there is a better way of doing what you planned to do.
如果我必须这样做，我会执行以下操作：{php}$number++{/php}但是必须在 smarty 模板中使用 php 非常难看。这可能表明有更好的方法来完成您计划做的事情。
