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December 8, 2017 05:30
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WP Widget API
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// WP widget API (collected from codex documentation) | |
<?php | |
/** | |
* Adds Foo_Widget widget. | |
*/ | |
class Foo_Widget extends WP_Widget { | |
/** | |
* Register widget with WordPress. | |
*/ | |
function __construct() { | |
parent::__construct( | |
'foo_widget', // Base ID | |
esc_html__( 'Widget Title', 'text_domain' ), // Name | |
array( 'description' => esc_html__( 'A Foo Widget', 'text_domain' ), ) // Args | |
); | |
} | |
/** | |
* Front-end display of widget. | |
* | |
* @see WP_Widget::widget() | |
* | |
* @param array $args Widget arguments. | |
* @param array $instance Saved values from database. | |
*/ | |
public function widget( $args, $instance ) { | |
echo $args['before_widget']; | |
if ( ! empty( $instance['title'] ) ) { | |
echo $args['before_title'] . apply_filters( 'widget_title', $instance['title'] ) . $args['after_title']; | |
} | |
echo esc_html__( 'Hello, World!', 'text_domain' ); | |
echo $args['after_widget']; | |
} | |
/** | |
* Back-end widget form. | |
* | |
* @see WP_Widget::form() | |
* | |
* @param array $instance Previously saved values from database. | |
*/ | |
public function form( $instance ) { | |
$title = ! empty( $instance['title'] ) ? $instance['title'] : esc_html__( 'New title', 'text_domain' ); | |
?> | |
<p> | |
<label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php esc_attr_e( 'Title:', 'text_domain' ); ?></label> | |
<input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>"> | |
</p> | |
<?php | |
} | |
/** | |
* Sanitize widget form values as they are saved. | |
* | |
* @see WP_Widget::update() | |
* | |
* @param array $new_instance Values just sent to be saved. | |
* @param array $old_instance Previously saved values from database. | |
* | |
* @return array Updated safe values to be saved. | |
*/ | |
public function update( $new_instance, $old_instance ) { | |
$instance = array(); | |
$instance['title'] = ( ! empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : ''; | |
return $instance; | |
} | |
} // class Foo_Widget |
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