Wordpress: trying to get posts by tag

Question

I\'ve written some code which automatically creates some posts and adds a tag to them. I can see the tags in the \'All posts\' admin panel and I can click on the posts \'Ta

Answer 1

Try this

$original_query = $wp_query;
$wp_query = null;
$args=array('posts_per_page'=>5, 'tag' => $brand_name);
$wp_query = new WP_Query( $args );
if ( have_posts() ) :
    while (have_posts()) : the_post();
        echo '<li>';
        the_title();
        echo '</li>';
    endwhile;
endif;
$wp_query = null;
$wp_query = $original_query;
wp_reset_postdata();

Answer 2

In your code, try:

$query=new WP_Query(array('posts_per_page=5', 'tag' => $brand_name));

instead of:

$query=new WP_Query(array('posts_per_page=5', array('tag' => array($brand_name))));

For further details, see https://codex.wordpress.org/Class_Reference/WP_Query#Tag_Parameters (and as mentioned on a recent duplicate post).

Note: $brand_name could be an array of strings, or comma separated values, etc., and the above code should work.

Alternatively, try:

$myPosts = get_posts(array('tag' => $brand_name));

See https://codex.wordpress.org/Template_Tags/get_posts

Answer 3

Answer was found here - https://codex.wordpress.org/Template_Tags/get_posts

Following example displays posts tagged with 'jazz', under 'genre' custom taxonomy, using 'tax_query'

$args = array(
    'tax_query' => array(
        array(
            'taxonomy' => 'genre',
            'field' => 'slug',
            'terms' => 'jazz'
        )
    )
);
$postslist = get_posts( $args );

So for you it will be

$args = array( 
        'posts_per_page' => 5,
        'tax_query'      => array(
            array(
                'taxonomy'  => 'post_tag',
                'field'     => 'slug',
                'terms'     => sanitize_title( $brand_name )
            )
        )
    );

$postslist = get_posts( $args );