Hinzufügen mehrerer meta-Boxen ein custom post type in wordpress

Kann es sein, komplett gekapselt in einer Klasse. Hier, ich bin nicht der Umgang mit dem hinzufügen der Benutzerdefinierten Post-Typ, und es gibt nur zwei einfache Ausgabe von Feldern, text und checkbox. Einen vollwertigen funktionierenden code kümmern sollte jeder der gewünschte input-Typen.

<?php
/**
 * Plugin Name: Sample Dynamic Meta Boxes
 * Plugin URI:  http://stackoverflow.com/q/13903529/1287812
 * Author:      brasofilo
 */
class B5F_Dynamic_Meta_Boxes 
{
    private $boxes;

    # Safe to start up
    public function __construct( $args )
    {
        $this->boxes = $args;
        add_action( 'plugins_loaded', array( $this, 'start_up' ) );
    }

    public function start_up()
    {
        add_action( 'add_meta_boxes', array( $this, 'add_mb' ) );
    }

    public function add_mb()
    {
        foreach( $this->boxes as $box )
            add_meta_box( 
                $box['id'], 
                $box['title'], 
                array( $this, 'mb_callback' ), 
                $box['post_type'], 
                isset( $box['context'] ) ? $box['context'] : 'normal', 
                isset( $box['priority'] ) ? $box['priority'] : 'default', 
                $box['args']
            );
    }

    # Callback function, uses helper function to print each meta box
    public function mb_callback( $post, $box )
    {
        switch( $box['args']['field'] )
        {
            case 'textfield':
                $this->textfield( $box, $post->ID );
            break;
            case 'checkbox':
                $this->checkbox( $box, $post->ID );
            break;
        }
    }

    private function textfield( $box, $post_id )
    {
        $post_meta = get_post_meta( $post_id, $box['id'], true );
        printf(
            '<label>%s: <input type="text" name="%s" value="%s" /></label> <small>%s</small><br/>',
            $box['title'],
            $box['id'],
            $post_meta,
            $box['args']['desc']
        );
    }

    private function checkbox( $box, $post_id )
    {
        $post_meta = get_post_meta( $post_id, $box['id'], true );
        printf(
            '<label>%s: </label><input type="checkbox" name="%s" %s /> <small>%s</small><br/>',
            $box['title'],
            $box['id'],
            checked( 1, $post_meta, false ),
            $box['args']['desc']
        );
    }
}

# ADD TWO META BOXES - DIFFERENT POST TYPES - DIFFERENT CONTEXTS AND PRIORITIES
$args = array(
    array(
        'id' => 'teaser_loop',
        'title' => 'Loop Time',
        'post_type' => 'post',
        'args' => array(
            'desc' => 'Enter the time',
            'field' => 'textfield',
        )
    ),
    array(
        'id' => 'teaser_link',
        'title' => 'Loop Link',
        'post_type' => 'page',
        'context' => 'side',
        'priority' => 'high',
        'args' => array(
            'desc' => 'Open link',
            'field' => 'checkbox',
        )
    ),
);
new B5F_Dynamic_Meta_Boxes( $args );

# ADD ANOTHER META BOX TO ANOTHER POST TYPE
$more_args = array(
    array(
        'id' => 'extra_box',
        'title' => 'And another one',
        'post_type' => 'teaser',
        'args' => array(
            'desc' => 'Open link',
            'field' => 'textfield',
        )
    ),
);
new B5F_Dynamic_Meta_Boxes( $more_args );

Dies ist nur ein Skelett, von hier aus gibt es eine Menge zu geschrieben werden. Einige Beispiele:

• Custom Metaboxen und Felder für WordPress

• HM Benutzerdefinierten Meta-Boxen für WordPress

• Meine WordPress-Meta-box-Klasse

• Meta Box plugin

Diese unsachgemäße Art und Weise der Zugabe von 2 Metaboxen? Es funktioniert, aber ich denke, es kann ineffizienten code/php. Original wurde veröffentlicht am https://typerocket.com

//Add form and basic text field
function press_meta_box(WP_Post $post) {
    add_meta_box('press_meta', 'Press Release Date', function() use ($post) {
        $field_name = 'press_date';
        $field_name2 = 'press_link';
        $field_value = get_post_meta($post->ID, $field_name, true);
        $field_value2 = get_post_meta($post->ID, $field_name2, true);
        wp_nonce_field('study_nonce', 'study_nonce');
        ?>
        <table class="form-table">
            <tr>
                <th> <label for="<?php echo $field_name; ?>">Press Release Date (MM/DD/YYYY)</label></th>
                <td>
                    <input id="<?php echo $field_name; ?>"
                           name="<?php echo $field_name; ?>"
                           type="text"
                           value="<?php echo esc_attr($field_value); ?>" />
                </td>
            </tr>
            <tr>
                <th> <label for="<?php echo $field_name2; ?>">Full link to pdf</label></th>
                <td>
                    <input id="<?php echo $field_name2; ?>"
                           name="<?php echo $field_name2; ?>"
                           type="text"
                           value="<?php echo esc_attr($field_value2); ?>" />
                </td>
            </tr>
        </table>
        <?php
    });
}
//Check for empty string allowing for a value of `0`
function empty_str( $str ) {
    return ! isset( $str ) || $str === "";
}
//Save and delete meta but not when restoring a revision
add_action('save_post', function($post_id){
    $post = get_post($post_id);
    $is_revision = wp_is_post_revision($post_id);
    $field_name = 'press_date';
    $field_name2 = 'press_link';

    //Do not save meta for a revision or on autosave
    if ( $post->post_type != 'press_release' || $is_revision )
        return;

    //Do not save meta if fields are not present,
    //like during a restore.
    if( !isset($_POST[$field_name]) )
        return;

    //Secure with nonce field check
    if( ! check_admin_referer('study_nonce', 'study_nonce') )
        return;

    //Clean up data
    $field_value = trim($_POST[$field_name]);
$field_value2 = trim($_POST[$field_name2]);
    //Do the saving and deleting
    if( ! empty_str( $field_value ) ) {
        update_post_meta($post_id, $field_name, $field_value);
    } elseif( empty_str( $field_value ) ) {
        delete_post_meta($post_id, $field_name);
    }
     //Do the saving and deleting 2
    if( ! empty_str( $field_value2 ) ) {
        update_post_meta($post_id, $field_name2, $field_value2);
    } elseif( empty_str( $field_value2 ) ) {
        delete_post_meta($post_id, $field_name2);
    }
});