<?php

function last_thirty_days( $where = '' ) {
	global $wpdb;

	$where .= $wpdb->prepare( " AND post_date > %s", date( 'Y-m-d', strtotime('-30 days') ) );

	return $where;
}

add_filter( 'posts_where', 'last_thirty_days' );

$some_posts = get_posts( array( 'suppress_filters' => false ) );

// Important to avoid modifying other queries
remove_filter( 'posts_where', 'last_thirty_days' );

?>

20 thoughts on “WordPress: Using Filters With get_posts()”

1. This is great, for me I am going to use something like this to only show ads on posts that are of a certain age..

   Reply

   1. You wouldn’t use this code to do that. You would want something like this:

      <?php
      
      if ( get_the_time('U') < strtotime('-30 days') ) {
      	// show ads
      }
      
      ?>

      Reply

2. Sweet, thanks! I knew it wasn’t right, but it got me thinking of what I wanted to do and then you did it for me,

   Much appreciated,

   Reply
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4. care to explain more about ‘suppress_filters’ ? what is it ?

   Reply

   1. It’s one of the function’s optional arguments. Setting it to false will disable the function from not using any filters on it’s query and results like it normally does.

      Reply

5. Thanks for the tip

   Reply

6. this was just enough information to get me in trouble!

   I ended up having filters for posts_where, post_limits, posts_orderby, posts_join, posts_groupby all working together in my plugin!

   thanks for the post, it really helped!

   Reply

7. Oh man! I was pulling hairs out for an hour over this until I found your post.

   Thanks so much, this allows for so many possibilities. Altering the where clause is really powerful.

   Question though: if I only want it to apply to one get_posts() and no others, or, say have different get_posts()’s on different parts of the theme have different where filters, should I do something like:

   function filter_where( $where = '' ) {
   	// posts in the last 30 days
   	$where .= " AND post_date > '" . date('Y-m-d', strtotime('-60 days')) . "'";
   	return $where;
   }
   add_filter( 'posts_where', 'filter_where' );
   			$posts = get_posts(array(
   				'suppress_filters' => false,
   				'numberposts' => -1,
   				'category__not_in' => explode(',',$subscriber->categories_excluded),
   				'post_type' => $post_types_included
   				)
   			);
   remove_filter( 'posts_where', 'filter_where' )
   

   (removing the filter so it doesn’t affect other suppress_filter get_posts()’s)

   I’m thinking this is necessary otherwise this filter will be carried out sitewide…

   Reply

   1. Yeah, that’s the best way to do it. Add it, query, and then remove it.

      Reply
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9. I’m trying to get the 6 previous posts in my single.php in relation to the post being displayed. Would you have an idea on how to use your code to achieve that task?

   Reply

10. I like this code a lot, but I am trying to add the filter inside a function and it doesn’t seem to be working, even if I remove the conditional. Is that something WordPress doesn’t allow for?

    function sr_get_submenu( $args, $sr_last_fourteen_days = false, $image_size = 'small_thumb' ) {
    	$output = '';
    	if($sr_last_fourteen_days) 
    	add_filter( 'posts_where', 'sr_last_fourteen_days' );
    	
    	$posts = get_posts( $args );
    	........
    
    	if($sr_last_fourteen_days) remove_filter( 'posts_where', 'sr_last_14_days' );
    	
    }
    
    function sr_last_fourteen_days( $where = '' ) {
        global $wpdb;
        $where .= $wpdb->prepare( " AND post_date > %s", date( 'Y-m-d', strtotime('-14 days') ) ); 
        return $where;
    }
    

    Reply

    1. That should work fine. Does $args contain suppress_filters?

       // ...
       
       $args = wp_parse_args( $args );
       $args['suppress_filters'] = false;
       
       $posts = get_posts( $args );
       
       // ...
       

       Reply

       1. You nailed it. That makes me feel dumb, but thanks a ton for the help.

          Reply

11. Thank you for your tips. It helps me a lot

    Reply

12. Thanks. I was wondering why the results weren’t filtered. So by default get_posts removes filters. I learned something !

    Reply

13. Great tip!

    But, how to add the suppress_filters to the_content or the_excerpt later? Imma getting strange chars displayed… :_(

    Best!

    Reply

    1. suppress_filters is a parameter for get_posts(). It doesn’t apply to other functions. Your issue is unrelated.

       Reply

14. Thanks you very much bro that help’s me alot

    Reply