wordpress display posts by category id


                                      Display post by category id




<?php
query_posts('cat=2&showposts=10');//put your category id in equal to cat
    if (have_posts()) : while (have_posts()) : the_post(); ?>      
    <div class="timeline">
    <h3><?php the_title(); ?></h3>
    <?php the_content();?>
    <?php endwhile; else: ?>
    <?php _e('No Posts Sorry.'); ?>
    <?php endif; ?>
</div>
or with pagination we can use: 
 
<?php
  $the_query = new WP_Query( array('posts_per_page'=>9,
                                 'post_type'=>'Post',
                                 //'cat' => '12',
                                 'order'=>'DESC',
                                 'paged' => get_query_var('paged') ? get_query_var('paged') : 1) 
                            ); 
                            ?>
    <?php while ($the_query -> have_posts()) : $the_query -> the_post(); 
    ?>
    <a href="<?php the_permalink(); ?>"><?php echo get_the_post_thumbnail( $post_id, 'large' );   ?></a>
   <a href="<?php the_permalink(); ?>"><?php echo get_the_title(); ?></a>
   <?php the_excerpt(); ?>
   <?php the_date(); ?><?php the_author(); ?>
   <a href="<?php comments_link(); ?>">Leave a Comment</a>
    <?php
    endwhile;

    $big = 999999999; // need an unlikely integer
     echo paginate_links( array(
        'base' => str_replace( $big, '%#%', get_pagenum_link( $big ) ),
        'format' => '?paged=%#%',
        'current' => max( 1, get_query_var('paged') ),
        'total' => $the_query->max_num_pages
    ) );
    
    wp_reset_postdata();
    ?>

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