*
* Usage:
*
* require get_template_directory() . '/inc/metabox.php';
* $_html = function() {
* ?>
meta_id = $meta_id;
$this->meta_title = $meta_title;
$this->callable = $callable;
$this->variables = $variables;
$this->screen = $screen;
$this->context = $context;
$this->priority = $priority;
$this->addAction();
}
/**
* Static Method to get meta value
* @param {string} $key Key for the meta value
* @param {integer} $_current_post_id (optional) if specific post meta value is needed.
* @return {string} the value for the key
*/
public static function get( $key, $_current_post_id = false) {
$field = null;
if( !$_current_post_id) {
global $post;
$field = get_post_meta( $post->ID, $key, true );
} else {
$field = get_post_meta( $_current_post_id, $key, true );
}
if ( ! empty( $field ) ) {
return is_array( $field ) ? stripslashes_deep( $field ) : stripslashes( wp_kses_decode_entities( $field ) );
} else {
return false;
}
}
function addAction() {
//Add Metaboxes
add_action( 'add_meta_boxes', array( $this, 'meta_add_meta_boxes'), 0 );
add_action( 'save_post', array( $this, 'on_meta_boxes_save') );
}
function meta_add_meta_boxes() {
add_meta_box(
$this->meta_id,
$this->meta_title,
//Render HTML
array( $this, 'meta_html'),
$this->screen,
$this->context,
$this->priority
);
}
function meta_html() {
wp_nonce_field( $this->meta_id, $this->meta_id );
call_user_func($this->callable);
}
function on_meta_boxes_save( $post_id ) {
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;
if ( ! isset( $_POST[$this->meta_id] ) || ! wp_verify_nonce( $_POST[$this->meta_id], $this->meta_id ) ) return;
if ( ! current_user_can( 'edit_post', $post_id ) ) return;
foreach( $this->variables as $var) {
if ( isset( $_POST[$var] ) )
update_post_meta( $post_id, $var, esc_attr( $_POST[$var] ) );
}
}
}