wpdb - Read For Learn

Does WordPress $wpdb functions wait when table is locked?

By itself wodb doesn’t do (and probably can’t) anything extra to what the DB will do. When the table is locked you will probably wait longer for a response or fail on timeout.

$wpdb select all meta for each post

This is really simple. get_post_meta($postid); This will return all values in about the same syntax. In a more workable loop: <?php $custom = new WP_Query(array(“posts_per_page” => -1)) if( $custom->have_posts() ) { while ( $custom->have_posts() ) { the_post(); $data = get_post_meta(get_the_ID()); } } else { /* No posts found */ } ?>

Optimizing WordPress Queries – Removing Group By ID

How to translate this mySQL query to $wpdb query

Connect to separate database using $wpdb and authenticate user

Get terms that contain posts that in turn belong to other terms?

This should get you the names of all such terms in an array $wpdb->get_col(“SELECT DISTINCT {$wpdb->terms}.name FROM {$wpdb->terms} INNER JOIN {$wpdb->term_taxonomy} ON {$wpdb->term_taxonomy}.term_id = {$wpdb->terms}.term_id INNER JOIN {$wpdb->term_relationships} ON {$wpdb->term_taxonomy}.term_taxonomy_id = {$wpdb->term_relationships}.term_taxonomy_id WHERE {$wpdb->term_taxonomy}.taxonomy = ‘shape’ AND {$wpdb->term_relationships}.object_id IN ( SELECT object_id FROM {$wpdb->term_relationships} INNER JOIN {$wpdb->term_taxonomy} ON {$wpdb->term_taxonomy}.term_taxonomy_id = {$wpdb->term_relationships}.term_taxonomy_id WHERE {$wpdb->term_taxonomy}.taxonomy = ‘color’ … Read more

Undefined offset: 0

Fixed it. function getUserIDandPush($ul){ global $table_prefix; // Prefix for Database table global $user_login; global $wpdb; // WordPress WPDB database method $dt = $table_prefix; //Tables Prefix if (!is_user_logged_in() && isset($_SERVER[‘LOGON_USER’])) { $as = $wpdb->get_results(‘SELECT * FROM ‘.$dt.’users WHERE user_login = “‘.$ul.'” ‘); $usID = $as[0]->ID; wp_set_current_user($usID, $ul); wp_set_auth_cookie($usID); do_action(‘wp_login’, $ul); } }