'Fuzzy' conditionals

Question

feeling little dumb for this.

What I am trying to do is to make my list of checkboxes checked depending on {segment_5}

If the value is '6', that is easy with

<input type="checkbox" name="categories[]" value="{category_id}" {if '{segment_5}' == '{category_id}'}checked='checked'{/if} /> {category_name}

I am in a situation where my url goes like this 'site.dev/search/geo/n31lj/6-7' from doing a search.
Look at {segment_5}, the value is '6-7', multiple categories have been selected.

How can I tell the {category_id} to pick up 6 or 7 inside the {segment_5} with conditionals?

Look at this link, I have tried but it not possible.
http://ellislab.com/expressionengine/user-guide/templates/globals/conditionals.html#comment_box_9433

Answer 1

There are a several ways really. You could use regular PHP:

$categories = "{segment_5}"; 

$category = explode("-", $categories);

echo "category 1 = $category[0]"; // 5
echo "Category 2 = $category[1]"; // 6

But beware of parse order when integrating with PHP tags.

Alternative you could always have some string fun. You can take advantage of the full array of PHP string functions such as explode() and split the URL segment by the dash creating an array values (5 and 6 in your case).

{exp:phpstringfun function="explode" par1="-" separator="|" reverse="y"}
    {segment_5}
{/exp:phpstringfun} 

Because segment variables are parsed very early in the rendering of the template this should work fine. I'm exploding segment 5 of the URL by the dash (-) and then replacing it with a pipe (|) character. You could then use that in your query to test for either 5 OR 6 by wrapping that in a Stash variable to call later on in your condtional:

{exp:stash:set name="categories" parse_tags="yes"}
    {exp:phpstringfun function="explode" par1="-" separator="|" reverse="y"}{segment_5}{/exp:phpstringfun} 
{/exp:stash:set}

{if segment_5 == '{exp:stash:categories}'}
    checked='checked'
{/if}

That will mark it as checked if segment_5 == '5|6', if that's what you want. Once you have it broken up though you can handle it in many ways.

Answer 2

== EDIT ==

{exp:stash:set name="numbers" parse_tags="yes"}
    {exp:low_replace find="-" replace="|"}{segment_4}{/exp:low_replace}
{/exp:stash:set}

{exp:channel:categories channel="items" category_group="3"}
    <input type="checkbox" name="categories[]" value="{category_id}" {exp:loopee foreach="{exp:stash:numbers}" parse="inward"}{if category_id == {loopee_value}}checked='checked'{/if}{/exp:loopee} /> {category_name}<br />
{/exp:channel:categories}

This does exactly the job I wanted to do. Converting any segment with values like 5-19-11 into individual values to be checked with a conditional in order to make a checkbox checked

Plugins required
Stash
Low replace
Loopee