WordPress obtains the total number of articles in a specified category (subcategory)

Implementation functions

First, define the implementation function and copy the following php code to functions. php of the current topic:

The code is as follows:

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Function ludou_get_cat_postcount ($ id ){ // Obtain the current category information $ Cat = get_category ($ id ); // Number of articles of the current category $ Count = (int) $ cat-> count; // Obtain all descendant categories of the current category $ Tax_terms = get_terms ('Category ', array ('child _ of' => $ id )); Foreach ($ tax_terms as $ tax_term ){ // Add the number of sub-categories $ Count + = $ tax_term-> count;    } Return $ count; }

Example

Okay. After defining the function, you only need to pass the category id parameter to the ludou_get_cat_postcount function. The following is an example:

The code is as follows:	Copy code
<? Php The number of articles in echo 'Id 123 and its descendant categories is: '. ludou_get_cat_postcount (123 ); ?>

Obtain the number of articles under a certain category

The code is as follows:	Copy code
<? Php echo get_category_by_slug ($ category_nickname)-> count;?>   <? Php echo get_category ($ category_ID)-> count;?>

Obtain other categories

The code is as follows:

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<? Php $ Cat = get_category_by_slug ($ category_nickname ); // $ Cat = get_category ($ category_ID ); Echo $ cat-> term_id; // Obtain the Category id Echo $ cat-> count; // Obtain the number of articles by category Echo $ cat-> description; // Obtain the category description. Echo $ cat-> name; // Obtain the category name Echo $ cat-> slug; // Obtain the alias of a category Echo $ cat-> parent; // gets a reference to the parent category of the current category ?>

Obtain the number of articles in a specific category

Place the following PHP code in functions. php under the topic directory:

The code is as follows:

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Function wt_get_category_count ($ input = ''){ Global $ wpdb; If ($ input = ''){ $ Category = get_the_category (); Return $ category [0]-> category_count;     } Elseif (is_numeric ($ input )){ $ SQL = "SELECT $ wpdb-> term_taxonomy.count FROM $ wpdb-> terms, $ wpdb-> term_taxonomy WHERE $ wpdb-> terms. term_id = $ wpdb-> term_taxonomy.term_id AND $ wpdb-> term_taxonomy.term_id = $ input "; Return $ wpdb-> get_var ($ SQL );     } Else { $ SQL = "SELECT $ wpdb-> term_taxonomy.count FROM $ wpdb-> terms, $ wpdb-> term_taxonomy WHERE $ wpdb-> terms. term_id = $ wpdb-> term_taxonomy.term_id AND $ wpdb-> terms. slug = '$ input '"; Return $ wpdb-> get_var ($ SQL );     } }

If this function is called up in the main loop and no parameters are provided, the number of articles in the first category is returned:

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<? Php echo wt_get_category_count () ;?>

2. If the provided parameter is a number and the number is the ID of the category, the number of articles with the corresponding ID is returned:

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<? Php echo wt_get_category_count (1);?>

3. If the alias of a category is provided, the number of classified articles corresponding to the abbreviated name (alias) is returned:

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<? Php echo wt_get_category_count ('Hello-world');?>

This function has a slight error in the number of articles for classification containing subcategories. The statistics on the number of classified articles is not very good.