The get_field_object ACF function can be used to get info and options for a specific field. First you need the field key of the specific field you wish to output. When editing a field group, click on the screen options tab at the top of the page. You should see an option to toggle the … Read more
To query posts by custom fields you can use the ‘meta_query’ parameter <?php $args = array( ‘post_type’ => ‘payment’, ‘meta_query’ => array( array( ‘key’ => ‘bookingref’, ‘value’ => ‘the_value_you_want’, ‘compare’ => ‘LIKE’ ), array( ‘key’ => ‘customerref’, ‘value’ => ‘the_value_you_want’, ‘compare’ => ‘LIKE’ ) ); query_posts($args); while (have_posts()) : the_post(); ?> you can’t use get_post_meta … Read more
You could try the REGEXP version: ‘meta_query’ => array( array( ‘key’ => ’email_address’, ‘value’ => ‘^hello@’, ‘compare’ => ‘REGEXP’, ) ) where ^ matches the beginning of a string. You can check the MYSQL reference on REGEXP here for more info. Notice that these are the possible values of the meta compare parameter: ‘=’, ‘!=’, … Read more
This part of wp_insert_posts() gives it away: if ( ! empty( $postarr[‘meta_input’] ) ) { foreach ( $postarr[‘meta_input’] as $field => $value ) { update_post_meta( $post_ID, $field, $value ); } } where we see how the post meta fields are updated/added with update_post_meta(). Here’s the inline description for meta_input: Array of post meta values keyed … Read more
You can use Advanced Custom Fields plugin. It’s pretty easy to use and very powerful, so it’s the best choice right now, I guess.
UPDATE: Based upon the update of the question I think I need to explicitly state that what is asked in the question can be done with the answer below, just used custom fields in the “Car” custom post type for each of the items you want displayed on all pages for a given car. If … Read more
This seems to be a bug in WordPress. WordPress actually modifies the meta_query if you specify orderby and meta_key as query vars. Normally this modification adds the new meta_key as the first array in meta_query array and hence the orderby is applied to the first meta key specified in meta_query. But when you modify orderby, … Read more
Each post meta key can have multiple values. So you get the values by default as an array; the first entry (0) is the oldest. get_post_custom() fetches all meta keys with their values. You could simplify your code with: $price = get_post_meta( $post->ID, ‘price’, TRUE ); $comake = get_post_meta( $post->ID, ‘coMake’, TRUE ); When the … Read more
Custom field names are arbitrary. The underscore hides it from the Custom Fields metabox on the post editing page. When referencing these custom fields in meta_query() or other functions, the underscore has to be used. Source: conversation with @toscho, @rarst and @wyck in the chat room.
As stated in @ambroseya’s answer, its supposed to work like that. Once you declare a meta query, even if you aren’t looking for a specific value, it will only query posts with that meta key declared. If you want to include all posts sort them by the meta key, use the following code: $args = … Read more