fields = array(
array(
'id' => 'transparent-header',
'label' => esc_html__( 'Transparent header', 'bulk' ),
'type' => 'checkbox',
),
array(
'id' => 'header-font-color',
'label' => esc_html__( 'Transparent header font color', 'bulk' ),
'type' => 'color',
),
);
add_action( 'add_meta_boxes', array( $this, 'add_meta_boxes' ) );
add_action( 'save_post', array( $this, 'save_post' ) );
}
/**
* Hooks into WordPress' add_meta_boxes function.
* Goes through screens (post types) and adds the meta box.
*/
public function add_meta_boxes() {
global $post;
if ( !empty( $post ) ) {
$pageTemplate = get_post_meta($post->ID, '_wp_page_template', true);
if ( $pageTemplate == 'template-parts/template-homepage.php' ) {
foreach ( $this->screens as $screen ) {
add_meta_box(
'header-options', esc_html__( 'Header Options', 'bulk' ), array( $this, 'add_meta_box_callback' ), $screen, 'normal', 'high'
);
}
}
}
}
/**
* Generates the HTML for the meta box
*
* @param object $post WordPress post object
*/
public function add_meta_box_callback( $post ) {
wp_nonce_field( 'header_options_data', 'header_options_nonce' );
$this->generate_fields( $post );
}
/**
* Generates the field's HTML for the meta box.
*/
public function generate_fields( $post ) {
$output = '';
foreach ( $this->fields as $field ) {
$label = '';
$db_value = get_post_meta( $post->ID, 'header_options_' . $field[ 'id' ], true );
switch ( $field[ 'type' ] ) {
case 'checkbox':
$input = sprintf(
'', $db_value === '1' ? 'checked' : '', $field[ 'id' ], $field[ 'id' ]
);
break;
default:
$input = sprintf(
'', $field[ 'type' ] !== 'color' ? 'class="regular-text"' : '', $field[ 'id' ], $field[ 'id' ], $field[ 'type' ], $db_value
);
}
$output .= $this->row_format( $label, $input );
}
echo '';
}
/**
* Generates the HTML for table rows.
*/
public function row_format( $label, $input ) {
return sprintf(
'| %s | %s |
|---|
', $label, $input
);
}
/**
* Hooks into WordPress' save_post function
*/
public function save_post( $post_id ) {
if ( !isset( $_POST[ 'header_options_nonce' ] ) )
return $post_id;
$nonce = $_POST[ 'header_options_nonce' ];
if ( !wp_verify_nonce( $nonce, 'header_options_data' ) )
return $post_id;
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
return $post_id;
foreach ( $this->fields as $field ) {
if ( isset( $_POST[ $field[ 'id' ] ] ) ) {
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, 'header_options_' . $field[ 'id' ], $_POST[ $field[ 'id' ] ] );
} else if ( $field[ 'type' ] === 'checkbox' ) {
update_post_meta( $post_id, 'header_options_' . $field[ 'id' ], '0' );
}
}
}
}
new bulk_meta_box;
}