0
X
Add Snippet To Project
New Project
Add To Existing Project
/**
* The WPTurbo Custom Meta Box class.
*
* This class is responsible for rendering a custom meta box in WordPress with user-defined fields/options.
* It uses the WordPress add_meta_box() and update_post_meta() functions to render and save field values.
*
* @link https://wpturbo.ai
* @since 1.0.0
* @package WPTurbo
*
*/
class WPTurbo_Custom_Meta_Box {
/**
* Array that defines display locations.
*
* @since 1.0.0
* @access private
* @var array $display_locations The list of locations where this meta box should be displayed.
*/
private $display_locations = [
];
/**
* Variables array that defines fields/options for the meta box.
*
* @since 1.0.0
* @access private
* @var array $fields The list of user defined fields/options.
*/
private $fields = [
];
/**
* WPTurbo_Custom_Meta_Box constructor.
*
* Adds actions to WordPress hooks "add_meta_boxes" and "save_post".
*
* @since 1.0.0
*/
public function __construct() {
add_action( 'add_meta_boxes', [ $this, 'wpturbo_register_meta_boxes' ] );
add_action( 'save_post', [ $this, 'wpturbo_save_meta_box_fields' ] );
}
/**
* Adds meta boxes to appropriate WordPress screens.
*
* @since 1.0.0
* @access public
*
* @return void
*/
public function wpturbo_register_meta_boxes() : void {
foreach ( $this->display_locations as $location ) {
add_meta_box(
'wpturbo-custom-meta-box', /* The id of our meta box. */
'My Custom Meta Box', /* The title of our meta box. */
[ $this, 'wpturbo_render_meta_box_fields' ], /* The callback function that renders the metabox. */
$location, /* The screen on which to show the box. */
'normal', /* The placement of our meta box. */
'default', /* The priority of our meta box. */
);
}
}
/**
* Renders the Meta Box and its fields.
*
* @since 1.0.0
* @access public
*
* @param WP_Post $post The post object.
*
* @return void
*/
public function wpturbo_render_meta_box_fields(WP_Post $post) : void {
wp_nonce_field( 'wpturbo-custom-meta-box_data', 'wpturbo-custom-meta-box_nonce' );
echo '<h3>My Custom Meta Box</h3>';
$html = '';
foreach( $this->fields as $field_id => $field ){
$meta_value = get_post_meta( $post->ID, $field_id, true );
if ( empty( $meta_value ) && isset( $field['default'] ) ) {
$meta_value = $field['default'];
}
$field_html = $this->wpturbo_render_input_field( $field_id, $field, $meta_value );
$label = "<label for='$field_id'>{$field['label']}</label>";
$html .= $this->wpturbo_format_field( $label, $field_html );
}
echo '<table class="form-table"><tbody>' . $html . '</tbody></table>';
}
/**
* Formats each field to table display.
*
* @since 1.0.0
* @access public
*
* @param string $label The field label.
* @param string $field The field HTML code.
*
* @return string
*/
public function wpturbo_format_field( string $label, string $field ): string {
return '<tr class="form-field"><th>' . $label . '</th><td>' . $field . '</td></tr>';
}
/**
* Renders each individual field HTML code.
*
* @since 1.0.0
* @access public
*
* @param string $field_id The field ID.
* @param array $field The field configuration array.
* @param string $field_value The field value.
*
* @return string The HTML code.
*/
public function wpturbo_render_input_field( string $field_id, array $field, string $field_value): string {
switch( $field['type'] ){
case 'select': {
$field_html = '<select name="'.$field_id.'" id="'.$field_id.'">';
foreach( $field['options'] as $key => $value ) {
$key = !is_numeric( $key ) ? $key : $value;
$selected = '';
if( $field_value === $key ) {
$selected = 'selected="selected"';
}
$field_html .= '<option value="' . $key . '" ' . $selected . '>' . $value . '</option>';
}
$field_html .= '</select>';
break;
}
case 'textarea': {
$field_html = '<textarea name="' . $field_id . '" id="' . $field_id . '" rows="6">' . $field_value . '</textarea>';
break;
}
default: {
$field_html = "<input type='{$field['type']}' id='$field_id' name='$field_id' value='$field_value' />";
break;
}
}
return $field_html;
}
/**
* Called when this metabox is saved.
*
* Saves the new meta values of our metabox.
*
* @since 1.0.0
* @access public
*
* @param int $post_id The post ID.
*
* @return int The post ID.
*/
public function wpturbo_save_meta_box_fields( int $post_id ) {
if ( ! isset( $_POST['wpturbo-custom-meta-box_nonce'] ) ) return;
$nonce = $_POST['wpturbo-custom-meta-box_nonce'];
if ( !wp_verify_nonce( $nonce, 'wpturbo-custom-meta-box_data' ) ) return;
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;
foreach ( $this->fields as $field_id => $field ) {
if( isset( $_POST[$field_id] ) ){
// Sanitize fields that need to be sanitized.
switch( $field['type'] ) {
case 'email': {
$_POST[$field_id] = sanitize_email( $_POST[$field_id] );
break;
}
case 'text': {
$_POST[$field_id] = sanitize_text_field( $_POST[$field_id] );
break;
}
}
update_post_meta( $post_id, $field_id, $_POST[$field_id] );
}
}
}
}
if ( class_exists( 'WPTurbo_Custom_Meta_Box' ) ) {
new WPTurbo_Custom_Meta_Box();
}
Ceci est un test de snippet