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Create Widget Plugin in WordPress:-


It is a special plugin of word press which will be displayed under the widget section.

it will be written in the oop's pattern.

PHP provide wp_widget class to define widget.

<?php

/*
plugin name:- Mywidget

description:-  it is for scs events description

version: 1.0

Author:  shiva

Author Uri:  www.shivaconceptsotuion.com

*/
class MyWidget extends WP_Widget
{
   function __construct()
   {
      parent::__construct('MYwidget',
__( 'MY Widget'),
array(
'customize_selective_refresh' => true,
)
);
   }
    function form($instance)
    {
      $defaults = array(
'title'    => '',

);

// Parse current settings with defaults
extract( wp_parse_args( ( array ) $instance, $defaults ) );

    ?>
    <p>
<label>Enter Title</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
   }
    function update($new_instance, $old_instance)
    {
    $instance = $old_instance;
    $instance['title']    = isset( $new_instance['title'] ) ? wp_strip_all_tags( $new_instance['title'] ) : '';
    return $instance;
 
    }
   function widget($args, $instance )
   {
       extract( $args );
       $title    = isset( $instance['title'] ) ? apply_filters( 'widget_title', $instance['title'] ) : '';
       echo '<div class="widget-text wp_widget_plugin_box">';
       echo $title;
       echo "</div>";
   }
}

function fun1() {
register_widget('MyWidget' );
}
add_action( 'widgets_init', 'fun1' );


?>


Widget another example:-

<?php

/*
plugin name:- news-widget

description:-  it is for scs events description

version: 1.0

Author:  shiva

Author Uri:  www.shivaconceptsotuion.com

*/

class News_Widget extends WP_Widget
{


public function __construct() {
parent::__construct('news_widget',
__( 'NEWS Widget', 'text_domain' ),
array(
'customize_selective_refresh' => true,
)
);
}

// The widget form (for the backend )
public function form( $instance ) {
$defaults = array(
'title'    => '',
'text'     => '',
'textarea' => '',
'checkbox' => '',
'select'   => '',
);

// Parse current settings with defaults
extract( wp_parse_args( ( array ) $instance, $defaults ) ); ?>

<?php // Widget Title ?>
<p>
<label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php _e( 'Widget 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 // Text Field ?>
<p>
<label for="<?php echo esc_attr( $this->get_field_id( 'text' ) ); ?>"><?php _e( 'Text:', 'text_domain' ); ?></label>
<input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'text' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'text' ) ); ?>" type="text" value="<?php echo esc_attr( $text ); ?>" />
</p>

<?php // Textarea Field ?>
<p>
<label for="<?php echo esc_attr( $this->get_field_id( 'textarea' ) ); ?>"><?php _e( 'Textarea:', 'text_domain' ); ?></label>
<textarea class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'textarea' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'textarea' ) ); ?>"><?php echo wp_kses_post( $textarea ); ?></textarea>
</p>

<?php // Checkbox ?>
<p>
<input id="<?php echo esc_attr( $this->get_field_id( 'checkbox' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'checkbox' ) ); ?>" type="checkbox" value="1" <?php checked( '1', $checkbox ); ?> />
<label for="<?php echo esc_attr( $this->get_field_id( 'checkbox' ) ); ?>"><?php _e( 'Checkbox', 'text_domain' ); ?></label>
</p>

<?php // Dropdown ?>
<p>
<label for="<?php echo $this->get_field_id( 'select' ); ?>"><?php _e( 'Select', 'text_domain' ); ?></label>
<select name="<?php echo $this->get_field_name( 'select' ); ?>" id="<?php echo $this->get_field_id( 'select' ); ?>" class="widefat">
<?php
// Your options array
$options = array(
''        => __( 'Select', 'text_domain' ),
'option_1' => __( 'Option 1', 'text_domain' ),
'option_2' => __( 'Option 2', 'text_domain' ),
'option_3' => __( 'Option 3', 'text_domain' ),
);

// Loop through options and add each one to the select dropdown
foreach ( $options as $key => $name ) {
echo '<option value="' . esc_attr( $key ) . '" id="' . esc_attr( $key ) . '" '. selected( $select, $key, false ) . '>'. $name . '</option>';

} ?>
</select>
</p>

<?php
}

// Update widget settings
public function update( $new_instance, $old_instance ) {
$instance = $old_instance;
$instance['title']    = isset( $new_instance['title'] ) ? wp_strip_all_tags( $new_instance['title'] ) : '';
$instance['text']     = isset( $new_instance['text'] ) ? wp_strip_all_tags( $new_instance['text'] ) : '';
$instance['textarea'] = isset( $new_instance['textarea'] ) ? wp_kses_post( $new_instance['textarea'] ) : '';
$instance['checkbox'] = isset( $new_instance['checkbox'] ) ? 1 : false;
$instance['select']   = isset( $new_instance['select'] ) ? wp_strip_all_tags( $new_instance['select'] ) : '';
return $instance;
}

// Display the widget
public function widget( $args, $instance ) {
extract( $args );

// Check the widget options
$title    = isset( $instance['title'] ) ? apply_filters( 'widget_title', $instance['title'] ) : '';
$text     = isset( $instance['text'] ) ? $instance['text'] : '';
$textarea = isset( $instance['textarea'] ) ?$instance['textarea'] : '';
$select   = isset( $instance['select'] ) ? $instance['select'] : '';
$checkbox = ! empty( $instance['checkbox'] ) ? $instance['checkbox'] : false;

// WordPress core before_widget hook (always include )
echo $before_widget;

   // Display the widget
   echo '<div class="widget-text wp_widget_plugin_box">';

// Display widget title if defined
if ( $title ) {
echo $before_title . $title . $after_title;
}

// Display text field
if ( $text ) {
echo '<p>' . $text . '</p>';
}

// Display textarea field
if ( $textarea ) {
echo '<p>' . $textarea . '</p>';
}

// Display select field
if ( $select ) {
echo '<p>' . $select . '</p>';
}

// Display something if checkbox is true
if ( $checkbox ) {
echo '<p>Something awesome</p>';
}

echo '</div>';

// WordPress core after_widget hook (always include )
echo $after_widget;
}

}

function fun() {
register_widget( 'News_Widget' );
}
add_action( 'widgets_init', 'fun' );



?>


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