Holen Sie sich die Kategorie-ID in die Kategorie-Vorlage

Sie können dazu get_the_category() verwenden.

Beispiel:

 <?php

$category = get_the_category(); 

// use this to echo the slug
echo $category[0]->slug;

// use this to echo the cat id
echo $category[0]->cat_ID;

// if you've got multiple categories you can run a foreach loop like so
foreach ( $category as $cat ) :

    echo '<li>' . $cat->name . '</li>';

endforeach;

?>
 

Sie können Folgendes verwenden:

 <?php
    echo '<pre>';
    print_r($category);
    echo '</pre>';
?>
 

,um das Array der zurückgegebenen Objekte anzuzeigen.

You could use get_the_category() to do that.

Example:

<?php

$category = get_the_category(); 

// use this to echo the slug
echo $category[0]->slug;

// use this to echo the cat id
echo $category[0]->cat_ID;

// if you've got multiple categories you can run a foreach loop like so
foreach ( $category as $cat ) :

    echo '<li>' . $cat->name . '</li>';

endforeach;

?>

You could use:

<?php
    echo '<pre>';
    print_r($category);
    echo '</pre>';
?>

to view the array of objects that are returned.

 $category = get_category( get_query_var( 'cat' ) );

$cat_id = $category->cat_ID;

$catname=explode(",",get_category_parents($cat_id,'',','));
print_r($catname);
 

$category = get_category( get_query_var( 'cat' ) );

$cat_id = $category->cat_ID;

$catname=explode(",",get_category_parents($cat_id,'',','));
print_r($catname);

Diemeisten der obengenannten Beispielefunktionieren,aber wenn Siemehrere Kategorien verwenden,funktioniert KEINE (zum Zeitpunkt des Schreibens,WP-Version 3.6) der anderen Methoden,um alle Kategorien abzurufen,die aneine derbeiden übergeben wurden. " cat "oder" category_name ".

Dereinzige Weg,denichgefunden habe,besteht darin,die Daten abzurufen von:

 $wp_query->query['category_name']
 

Ausirgendeinem Grundgibt dieseinen anderen Wert als get_query_var( 'category_name' ) zurück,dernur dieerste Kategorie zurückgibt.

Wenn Siemehrere Kategorien verwenden,müssen Sieeine Funktion wie explode verwenden,umein Array von Kategorie-Slugs zuerhalten,und diese dann durchlaufen,um alle IDs abzurufen:

 <?php
global $wp_query;

//grab all categories from query string (if using `category_name`)
$category_slugs_array = explode("+",esc_attr($wp_query->query['category_name']));

$categories = array();
$category_ids = array();

//loop through all the slugs
foreach($category_slugs_array as $category_slug)
{
    //get category object using slug
    $category = get_category_by_slug( $category_slug );

    //check to make sure a matching category has been found
    if(isset($category->cat_ID))
    {
        $categories[] = $category;
        $category_ids[] = $category->cat_ID;
    }
}

var_dump($categories); //array of categories
var_dump($category_ids); //array of category IDs

?>
 

Bei der Verwendung von AND (+) - oder OR (,) -Operatorenmüssennatürlicheinige Überlegungenberücksichtigt werden.

Most of the above examples work but if you are using multiple categories NONE (as of writing, WP version 3.6) of the other methods work to get all the categories that have been passed to either "cat" or "category_name".

The only way I have found is to pull the data from:

$wp_query->query['category_name']

For some reason this returns a different value to get_query_var( 'category_name' ) which only returns the first category.

When using multiple categories you will have to use some function like explode to get an array of category slugs, then loop through that to grab all the IDs:

<?php
global $wp_query;

//grab all categories from query string (if using `category_name`)
$category_slugs_array = explode("+",esc_attr($wp_query->query['category_name']));

$categories = array();
$category_ids = array();

//loop through all the slugs
foreach($category_slugs_array as $category_slug)
{
    //get category object using slug
    $category = get_category_by_slug( $category_slug );

    //check to make sure a matching category has been found
    if(isset($category->cat_ID))
    {
        $categories[] = $category;
        $category_ids[] = $category->cat_ID;
    }
}

var_dump($categories); //array of categories
var_dump($category_ids); //array of category IDs

?>

Obviously there needs to be some considerations when using AND (+) or OR (,) operators.