Retreiving Child Post Categories. WordPress

WP Answers comments:

Thank you very much for this. It is working nicely. :)

I have one more question related to this. (I can increase prize money if you need)

My other request is to generate an unordered list of only the child categories. Each item will also need a "data-id" with the category name.

Here is an example of the output I will need:

<ul class="category_filter_list">
<li data-value="red"><a href="#">Red</a></li>
<li data-value="blue"><a href="#">Blue</a></li>
<li data-value="yellow"><a href="#">Yellow</a></li>
</ul>

I greatly appreciate your assistance

Cheers

Nilesh shiragave comments:

User this code after my previous code


<ul class="category_filter_list">
<?php
foreach ($categories as $category) {
echo '<li data-value="'.$category->cat_name.'"><a href="#">'.$category->cat_name.'</a></li>';
}
?>
</ul>


WP Answers comments:

Thank you very much for the additional code, however it seems to be displaying every post category instead of only the child categories.

Here is the full code below. Can you please let me know if I've made an error in the code?


function get_category_id($cat_name){
$term = get_term_by('name', $cat_name, 'category');
return $term->term_id;
}

$category_ID = get_category_id($portfolio_parent);



$args=array(
'child_of' => $category_ID
);

$categories=get_categories($args);



echo '<ul class="category_filter_list">';
$category_id=get_categories($args);
foreach ($categories as $category) {
echo '<li data-value="'.$category->cat_name.'"><a href="#">'.$category->cat_name.'</a></li>';
}
echo '</ul>';

Nilesh shiragave comments:

Add this code in functions.php


function get_category_id($cat_name){

$term = get_term_by('name', $cat_name, 'category');

return $term->term_id;

}


And following code where you want to display this child categories


$category_ID = get_category_id($portfolio_parent);
$args=array(
'child_of' => $category_ID
);
$categories=get_categories($args);

echo '<ul class="category_filter_list">';

foreach ($categories as $category) {

echo '<li data-value="'.$category->cat_name.'"><a href="#">'.$category->cat_name.'</a></li>';

}


How you are setting $portfolio_parent value?

WP Answers comments:

Hi There,

Thank you again, however when I make those coding changes, none of the page content gets displayed at all. This is generally caused by error in the code correct?

The $portfolio_parent is set from a custom meta box. On the page editing screen there is a dropdown list which displays all post categories. The user selects the category and that category is stored in $portfolio_parent

Nilesh shiragave comments:

Add this code in functions.php

function get_category_id($cat_name){

$term = get_term_by('name', $cat_name, 'category');

return $term->term_id;

}


And following code where you want to display this child categories







<?php
$category_ID = get_category_id($portfolio_parent);
$args=array(

'child_of' => $category_ID

);

$categories=get_categories($args);
echo '<ul class="category_filter_list">';
foreach ($categories as $category) {
echo '<li data-value="'.$category->cat_name.'"><a href="#">'.$category->cat_name.'</a></li>';
}
echo '</ul>';
?>


Can you check in source code what is error. you can view that error in source code.?

WP Answers comments:

Sure thing. I turned on WP_DEBUG and got the following error:

Fatal error: Cannot redeclare get_category_id() (previously declared in /Users/macuser/Dropbox/MAMP/theme-demo/wp-content/themes/New-Theme/functions.php:51) in /Users/macuser/Dropbox/MAMP/theme-demo/wp-content/themes/New-Theme/functions/content/portfolio-content-4-col.php on line 12

Nilesh shiragave comments:

can you remove



function get_category_id($cat_name){
$term = get_term_by('name', $cat_name, 'category');
return $term->term_id;
}



this code from content-4-col.php i think it is on line number 12

WP Answers comments:

Hi There,

I got it working properly :)

I am using your original solution for displaying the unordered list.

it seems that I needed to re-define the $portfolio_parent value within the portfolio page rather than in an external file that is called in globally.

Thank you very much for all of your help.

Cheers.


The working code is:

echo '<ul class="category_filter_list">';
$category_id=get_categories($args);
foreach ($categories as $category) {
echo '<li data-value="'.$category->cat_name.'"><a href="#">'.$category->cat_name.'</a></li>';
}
echo '</ul>';

WP Answers comments:

Hi,

WPQuestions is not giving me the option to select a winning answer. Do you know how I can send you the prize money?

Nilesh shiragave comments:

Good.... finally that worked.... i hope you will increase price money :)

WP Answers comments:

I "voted" on this question and selected you as the winner. Please let me know if you received the prize money.

I think there is bug with WPQuestions site because it normally displays a link to "Select as winner".

I was also unable to increase prize money but I am glad to send you more prize money via PayPal. Please let me know your PayPal ID and I will send over more prize.

Cheers