single.php - show content if in_category WordPress

Cracks comments:

Definitely interested.

Are there any negatives to doing it this way? Does it limit what I can do with the custom fields?

Now that I think about it though, is it any easier to achieve my goal with custom fields (as opposed to the secondary_content plugin)? Or does it leave me in the same dilemma? How would I isolate the custom field according to the category being viewed?

if viewing at URL/category-a/im-not-that-smart, then show 'custom_field'
else if viewing at URL/category-b/im-not-that-smart, then show 'custom_field'
else if viewing at URL/category-c/im-not-that-smart, then show 'custom_field'

Denzel Chia comments:

Hi

I downloaded secondary content plugin and read the codes, it is the same as what I have for my theme. The secondary content plugin is actually custom meta boxes, using custom fields.

I have an idea from the above code you post, since you say secondary content plugin works for you.


<?php the_content(); ?>

<?php the_secondary_content(); ?>

<?php

if(is_category('4')){
the_secondary_content(2);
}elseif(is_category('5')){
the_secondary_content(3);
}elseif(is_category('6')){
the_secondary_content(4);
}else{
//do nothing
}

?>


You can refer to http://codex.wordpress.org/Function_Reference/is_category for other category check parameters.

I am not sure if
is_category('4') with the quotes are correct or
is_category(4) without the quotes are correct.

You may have to try them out.

Thanks.

Denzel Chia comments:

Hi,

You can also use the category slug to determine which category you are in,

for example;


<?php the_content(); ?>

<?php the_secondary_content(); ?>


<?php

if(is_category('category-a')){

the_secondary_content(2);

}elseif(is_category('category-b')){

the_secondary_content(3);

}elseif(is_category('category-c')){

the_secondary_content(4);

}else{

//do nothing

}

?>


Thanks

Cracks comments:

* Remembering that the post is in <em>more-than-one category</em>,
* Remembering that this is in <em>single.php</em>
* secondary_category <em>only works</em> when posts are in one category (not mulitple categories) .....

Won't the above code result in the same problem?
The post is in category-a AND category-b AND category-c. So all conditional statements are true (always. Irrespective of which category the post is being viewed in), and therefore all secondary_contents are displayed.

Cracks comments:

Just to clarify .....

* post is 'hello world'
* post is in 3 categories (category-a, category-b, category-c)
* 3 <em>different</em> contents will be declared - content for category-a, content for category-b, content for category-c
* I'm totally open to how the content is declared - either custom field (where wysiwyg-able) or a plugin like secondary_content

The end result just needs to be ...
* if viewing at - URL/category-a/hello-world, show content declared for category-a
* if viewing at - URL/category-b/hello-world, show content declared for category-b
* if viewing at - URL/category-c/hello-world, show content declared for category-c

Denzel Chia comments:

Hi,

Got the solution. Please put the below in your functions.php


<?php
//function to get current url of webpage
function curPageURL() {
$pageURL = 'http';
if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
$pageURL .= "://";
if ($_SERVER["SERVER_PORT"] != "80") {
$pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
} else {
$pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
}
return $pageURL;
}

//find match of category slug in current url
function cat_match($cat_name){
$subject = curPageURL();
$pattern = "/$cat_name/";
preg_match($pattern, $subject, $matches);
echo $matches[0];
}

?>


Put the below code in single.php



<?php the_content(); ?>

<?php the_secondary_content(); ?>


<?php
if(cat_match('category-a')){
the_secondary_content(2);
}elseif(cat_match('category-b')){
the_secondary_content(3);
}elseif(cat_match('category-c')){
the_secondary_content(4);
}else{
//none
}
?>



Thanks

Denzel Chia comments:

Hi,

Sorry make a mistake, for function cat_match($cat_name)
it should be return not echo

function cat_match($cat_name){

$subject = curPageURL();

$pattern = "/$cat_name/";

preg_match($pattern, $subject, $matches);

return $matches[0];

}


Thanks.