Get query post form tag id in post

// WP_Query arguments
$args = array ( 'tag_id' => '1,2,3' );
// The Query
$query = new WP_Query( $args );

OR

// WP_Query arguments
$args = array ( 'tag_name' => 'blogging, wordpress, slug');
// The Query
$query = new WP_Query( $args );

`<?php
// the query $args = array ( ‘tag_id’ => ‘1,2,720’ );
$the_query = new WP_Query( $args ); ?>

<?php if ( $the_query->have_posts() ) : ?>

<!– pagination here –>

<!– the loop –>
<?php while ( $the_query->have_posts() ) : $the_query->the_post(); ?>
<h2><?php the_title(); ?></h2>
<?php endwhile; ?>
<!– end of the loop –>

<!– pagination here –>

<?php wp_reset_postdata(); ?>

<?php else: ?>
<p><?php _e( ‘Sorry, no posts matched your criteria.’ ); ?></p>
<?php endif; ?>

I used this code but not work…

Try this variant:

<?php
// the query
$args = array('tag__in' => array( 1, 2, 720,),);
$the_query = new WP_Query( $args ); ?>

Be sure every line is really a separate line as shown, sometimes a missing line feed is not apparent but throws off the parser.

Thanks bcworkz!

And I want to get list tag id of post separated by commas? how?

Oh…

<?php $posttags = get_the_tags(); if ($posttags) {foreach($posttags as $tag) {echo $tag->term_id.',';}}?>

Thanks for your support

Don’t you then end up with a dangling comma at the end of the list? An improvement (IMHO) would be to use the loop to collect the IDs into an array, then use join() to build the list with no dangling comma, which is then echoed out all at once.

I don’t know… you can tell me more detail?

Your code outputs something like this:
21,33,45,123,

with the comma on the end. Maybe that works with how you are displaying the IDs, or it just doesn’t matter to you. Little details like that bother some people, sometimes including me. I would prefer the output is more like this:
21, 33, 45, 123

Not a huge difference, but it matters to some, and the additional coding is minimal, like so:

$posttags = get_the_tags();
$tag_ids = array();
if ( $posttags ) {
   foreach( $posttags as $tag ) {
      $tag_ids[] = $tag->term_id;
   }
}
echo join( ', ', $tag_ids );

Please check your code? This not work exactly ??

???
Not work exactly how?
Works for me, on a template in the “Loop”, exactly as I expected:
21, 33, 45, 123

<?php
$posttags = get_the_tags();
if ($posttags) {$dem= 0; foreach($posttags as $tag) {$dstag[$dem]= $tag->term_id; $dem++;}}
$args = array('tag__in' => $dstag);
$the_query = new WP_Query( $args );  ?>

<?php if ( $the_query->have_posts() ) : ?>

<!-- pagination here -->

	<!-- the loop -->
	<?php while ( $the_query->have_posts() ) : $the_query->the_post(); ?>
	<h2><?php the_title(); ?></h2>
	<?php endwhile; ?>
	<!-- end of the loop -->

<!-- pagination here -->

<?php wp_reset_postdata(); ?>

<?php else: ?>
	<p><?php _e( 'Sorry, no posts matched your criteria.' ); ?></p>
<?php endif; ?>

I used this code, worked but…
This code will show posts from tags of current post… but, it show current post… Please help me except current post ??

Use this for the WP_Query args:

$args = array(
   'tag__in' => $dstag,
   'post__not_in' => array( get_the_ID()),
);

Thanks you!