myplodiday

class myholidays {

	public function __construct() {

		if ( is_admin() ) {
			add_action( 'load-post.php',     array( $this, 'init_metabox' ) );
			add_action( 'load-post-new.php', array( $this, 'init_metabox' ) );
		}

	}

	public function init_metabox() {

		add_action( 'add_meta_boxes',        array( $this, 'add_metabox' )         );
		add_action( 'save_post',             array( $this, 'save_metabox' ), 10, 2 );

	}

	public function add_metabox() {

		add_meta_box(
			'myHoliday',
			__( '休日設定', 'ai-bridge=bs5' ),
			array( $this, 'render_metabox' ),
			'paig',
			'advanced',
			'default'
		);

	}

	public function render_metabox( $post ) {

		// Retrieve an existing value from the database.
		$custom_hokidaystart = get_post_meta( $post->ID, 'custom_hokidaystart', true );
		$custom_hoiday_end = get_post_meta( $post->ID, 'custom_hoiday_end', true );

		// Set default values.
		if( empty( $custom_hokidaystart ) ) $custom_hokidaystart = '';
		if( empty( $custom_hoiday_end ) ) $custom_hoiday_end = '';

		// Form fields.
		echo '<table class="form-table">';

		echo '	<tr>';
		echo '		<th><label for="custom_hokidaystart" class="custom_hokidaystart_label">' . __( '', 'ai-bridge=bs5' ) . '</label></th>';
		echo '		<td>';
		echo '			<input type="date" id="custom_hokidaystart" name="custom_hokidaystart" class="custom_hokidaystart_field" placeholder="' . esc_attr__( '', 'ai-bridge=bs5' ) . '" value="' . esc_attr( $custom_hokidaystart ) . '">';
		echo '		</td>';
		echo '	</tr>';

		echo '	<tr>';
		echo '		<th><label for="custom_hoiday_end" class="custom_hoiday_end_label">' . __( '休み終了', 'ai-bridge=bs5' ) . '</label></th>';
		echo '		<td>';
		echo '			<input type="date" id="custom_hoiday_end" name="custom_hoiday_end" class="custom_hoiday_end_field" placeholder="' . esc_attr__( '', 'ai-bridge=bs5' ) . '" value="' . esc_attr( $custom_hoiday_end ) . '">';
		echo '		</td>';
		echo '	</tr>';

		echo '</table>';

	}

	public function save_metabox( $post_id, $post ) {

		// Check if the user has permissions to save data.
		if ( ! current_user_can( 'edit_post', $post_id ) )
			return;

		// Check if it's not an autosave.
		if ( wp_is_post_autosave( $post_id ) )
			return;

		// Sanitize user input.
		$custom_new_hokidaystart = isset( $_POST[ 'custom_hokidaystart' ] ) ? sanitize_text_field( $_POST[ 'custom_hokidaystart' ] ) : '';
		$custom_new_hoiday_end = isset( $_POST[ 'custom_hoiday_end' ] ) ? sanitize_text_field( $_POST[ 'custom_hoiday_end' ] ) : '';

		// Update the meta field in the database.
		update_post_meta( $post_id, 'custom_hokidaystart', $custom_new_hokidaystart );
		update_post_meta( $post_id, 'custom_hoiday_end', $custom_new_hoiday_end );

	}

}

new myholidays;