WP_Widget is deprecated since version 4.3.0! Use __construct

// WP_Widget is deprecated since version 4.3.0! Use __construct()


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solution 1
Until you figure out which plugin is causing the issue, turn your site debug off. Place/edit this in wp-config.php:

define('WP_DEBUG', false);

see more here  https://codex.wordpress.org/Debugging_in_WordPress
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solution 2
class GoogleAdsensePlugAndPlayWidget extends WP_Widget
{
  function __construct()
  {
    $widget_ops = array('classname' => 'GoogleAdsensePlugAndPlayWidget', 'description' => 'Adsense Plug & Play - Sidebar add' );
    parent::__construct('GoogleAdsensePlugAndPlayWidget', 'Adsense Plug & Play - Sidebar add', $widget_ops);
  }
 // ...........
}
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solution 3
add_filter('deprecated_constructor_trigger_error', '__return_false');
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solution 4
if your code show like below
function VMenuWidget() {
		$widget_ops = array('classname' => 'vmenu', 'description' => __('Use this widget to add one of your custom menus as a widget.', THEME_NS) );
		//parent::WP_Widget( false , __('Vertical Menu', THEME_NS), $widget_ops );
		parent::__construct( false , __('Vertical Menu', THEME_NS), $widget_ops );
}


we have to update
function LoginWidget(){
	  $widget_ops = array('classname' => 'login', 'description' => __( 'Login form', THEME_NS) );
	  //$this->WP_Widget(false, __('Login', THEME_NS), $widget_ops);
	  parent::__construct(false, __('Login', THEME_NS), $widget_ops);
	}


that means use 	parent::__construct  OR parent::WP_Widget  instead of  $this->WP_Widget

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solution 5

Here is the solution
First find $this->WP_Widget( from your directory. For this you can use Find in Files in windows. Find $this->WP_Widget( , select your directory and then click on Find All. Here is the image
After that select that file/files where $this->WP_Widget( found and replace with parent::__construct(. I think your error will be solved.
Enjoy It.
Thank you.
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solution 6
https://gist.github.com/chriscct7/d7d077afb01011b1839d
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solution 7
https://circlecube.com/says/2015/09/how-to-fix-the-called-constructor-method-for-wp_widget-is-deprecated-since-version-4-3-0/
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