Smarty getting substring of a var with strpos as start and strlen as end

问题

I am having issue formatting variables in smarty. I was wondering what is the best way to do it. Basically i have a string "ABC | DEFGH" i want smarty to get the substring of "DEFGH" How would i go about doing this?

{$var|substr:strpos:"|":strlen}

doesn't work

回答1:

Just solved this without setting var back in PHP, and by using the built-in function wrappers.

Assuming that: $var = "ABC|DEFGH";

{assign var="bar_at" value=$var|strpos:"|"}
<li>{$var}</li>
<li>{$var|substr:0:$bar_at}</li>
<li>{$var|substr:$bar_at+1}</li>

This will print:

ABC|DEFGH

ABC

DEFGH

回答2:

Some info about Smarty 3 in case if someone want to achieve the same in Smarty 3 and not in Smarty 2:

The first thing is that you need to add parentheses to make it work. substr:$bar_at+1 won't work but substr:($bar_at+1) will work.

But in fact you can use simpler syntax:

{assign var="var" value="ABC | DEFGH"}

{$var|substr:($var|strpos:"|"+1)}

This will give you DEFGH with space at the beginning (before and | are spaces inside var in your question and in my example) and as you want to get string without space you should use in this case +2 instead of +1:

{$var|substr:($var|strpos:"|"+2)}

Those above were tested in Smarty 3.1.19.

You should also know that in previous versions (before Smarty 3.1) if you have in your string UTF-8 characters you should rather use mb_ functions.

As of Smarty 3.1 in case if mbstring extension is installed Smarty automatically uses mb_ functions in that case so there won't be any problem with utf-8 characters.

You can read more about Smarty utf-8 encoding

回答3:

Those functions do not exist in smarty. You'll have to split it in PHP before sending it to the template. Or you could write your own split function smarty plugin. Or use {php} tags in the template, but I'd avoid that solution as it is against the 'spirit' and purpose of using smarty, separation of presentation and logic, etc etc.

回答4:

When using like Jimby:

{$var|substr:$bar_at+1}

I add parentheses or round bracket to make it work.

{$var|substr:($bar_at+1)}

来源：https://stackoverflow.com/questions/4389978/smarty-getting-substring-of-a-var-with-strpos-as-start-and-strlen-as-end