wp-query - Read For Learn

WordPress 4.9.5 PHP intermittent warning trim() expects parameter 1 to be string, array given

I ran into this today. It’s a bug. I filed a bug report here: https://core.trac.wordpress.org/ticket/46797 The problem is this line of code: $qv[‘name’] = trim( $qv[‘name’] ); Source: https://github.com/WordPress/wordpress-develop/blob/a0ca5afd8977b5a3857084d9cb1bd345166e2f21/src/wp-includes/class-wp-query.php#L764 A (malicious) user sends a request that looks like: GET /?q=user/password&name[#post_render][]=passthru&name[#type]=markup&name[#markup]=echo ‘Vuln!! patch it Now!’ > vuln.htm; echo ‘Vuln!!’> sites/default/files/vuln.php; echo ‘Vuln!!’> vuln.php; cd sites/default/files/; echo … Read more

How to query serialized array by comparing greater than (>=)?

serialised array in a meta_value for query It’s not a good idea to save serialised array in a meta_value if you plan to query with any value within that serialized array later. So, the best option is to save meta data as key / value pair. Query Serialized array Although it’s not a good approach, … Read more

Is it possible to select against a post’s parent’s fields with WP_Query?

You should use posts_join and posts_where filters to modify JOIN and WHERE clauses. add_filter( ‘posts_join’ , ‘se333659_posts_join’, 20, 2 ); add_filter( ‘posts_where’ , ‘se333659_posts_where’, 20, 2 ); function se333659_posts_join( $join, $query ) { global $wpdb; if ( isset($query->query_vars[‘_rev_of_publ’]) && $query->query_vars[‘_rev_of_publ’] == ‘1’ ) { $join .= ” LEFT JOIN {$wpdb->posts} AS rev_p ON ({$wpdb->posts}.post_parent = … Read more

query_posts() in function makes global $wp_query out of sync?

Update with a better example header( ‘Content-Type: text/plain;charset=utf-8’ ); error_reporting( E_ALL | E_STRICT ); function failed_unset() { // Copy the variable to the local namespace. global $foo; // Change the value. $foo = 2; // Remove the variable. unset ( $foo ); } function successful_unset() { // Remove the global variable unset ( $GLOBALS[‘foo’] ); … Read more

How can I generate a RSS feed based on a custom WP_Query?

You should use add_feed() function (take name of feed and callback) to add new feed, it will take care of settings up hooks and rewrite rules automagically. Then in your callback function you can use query_posts() to override query before loading template.

Does WordPress generate an automatic page for post formats?

Take a look at get_post_format_link() Here’s a little example that uses get_post_format_link() to show a link to the format’s archive page. You can see something similar to this in action on Justin Tadlock’s site. function get_post_format_archive_link() { return sprintf( ‘<a class=”post-format-archive-link %1$s” href=”https://wordpress.stackexchange.com/questions/39925/%2$s”>%1$s</a>’, get_post_format(), get_post_format_link( get_post_format() ) ); } usage: echo get_post_format_archive_link(); The URL Structure … Read more

How can I save an array from a random post sequence for later use?

My suggestion is to store the workouts as a new entry inside the particular user’s meta data. » Saving a single workout Suppose the workout consists of the exercise IDs 1, 3, 5, 9. Then the code is: // this is the current workout $workout = array(1, 3, 5, 9); // get the current user … Read more

How to get first post in a category of a custom taxonomy

tax_query takes an array of tax query arguments arrays (it takes an array of arrays) but you are using only single array. The correct code is as following. <ul class=”product-categories”> <?php $categories = get_terms( array( ‘produkter’ ), array( ‘hide_empty’ => false, ) ); foreach( $categories AS $cat ) { $taxonomy = new WP_Query( array( ‘posts_per_page’ … Read more

Display posts the match taxonomy term linked from wp_list_categoies?

Steve, you’ve asked a couple of questions which I had a look at, and I came to the conclusion that your loop is causing all of your headaches. My loop to display ALL the posts is: $args = array( ‘post_type’ => ‘design_asset’, ‘posts_per_page’ => 100, ‘orderby’ => ‘title’, ‘order’ => ‘ASC’ ); $loop = new … Read more

Using WP_Query To Get Posts Randomly From today

I don’t think there is a parameter value Today as you used in date_query. If you want to return today’s post then you should provide date value to date_query as you stored current date in $today array. So here is your query now. $today = getdate(); $args = array( ‘tag_slug__in’ => array( ‘destacado’), ‘posts_per_page’ => … Read more

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