The called constructor method for WP_Widget is dep

问题:

I just updated to WordPress 4.3 and it seems that something is broken.

I get this error that shows up on my page:

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use __construct() instead. in /mnt/stor13-wc1-ord1/754452/www.eden-festival.com/web/content/securewp/wp-includes/functions.php on line 3457

Is there something that needs to be fixed?

回答1:

Since php 7 isn't supporting anymore the old php 4 object construct and replaced with __construct() Wordpress developers created a notice message so the plugin developers would change the way their plugins work so it could run on next php versions and as php 4 is dead long time ago there's no reason to use this style of object construct.

How to fix?

Option 1 - not going to upgrade to newer php versions

just add add_filter('deprecated_constructor_trigger_error', '__return_false');

to your functions.php file it will ignore those notices.

Option 2 - might upgrade to php 7 / prefer dealing with the issue rather than silencing it

If this is a third party plugin, beware that if you make the change yourself and the plugin developer will release an update it will override your changes.Contacting the plugin developer to fix this issue will be the best option

Find the problematic plugin and change

parent::WP_Widget

To

parent::__construct

回答2:

I am also getting the same error And I fixed it in such a way

class Dokan_Category_Widget extends WP_Widget {

    /**
     * Constructor
     *
     * @return void
     **/
    public function __construct() {
        $widget_ops = array( 'classname' => 'dokan-category-menu', 'description' => __( 'Dokan product category menu', 'dokan' ) );
        $this->WP_Widget( 'dokan-category-menu', 'Dokan: Product Category', $widget_ops );
    }
}

As way of calling constructor in such way is deprecated in php 7, so I replaced calling way as $this->WP_Widget() with parent::__construct()

class Dokan_Category_Widget extends WP_Widget {

    /**
     * Constructor
     *
     * @return void
     **/
    public function __construct() {
        $widget_ops = array( 'classname' => 'dokan-category-menu', 'description' => __( 'Dokan product category menu', 'dokan' ) );
        //$this->WP_Widget( 'dokan-category-menu', 'Dokan: Product Category', $widget_ops );
        parent::__construct('dokan-category-menu', 'Dokan: Product Category', $widget_ops  );
    }
}

回答3:

I guess you are using some plugin that is not updated after wordpress updates and having some code like class ***_Widget extends WP_Widget { .you should update that plugin or deactivate it until It is updated.

回答4:

Declaring a function then calling the parent constructor resolved this issue for me.

class myClass extends WP_Widget {
  function __construct(){
     parent::__construct(...) // calls constructor from WP_Widget class
  }
}

回答5:

I experienced this issue and I found by changing the 'true' statement to 'false' in /wp-includes/functions.php it disabled the errors.

if ( WP_DEBUG && apply_filters( 'deprecated_constructor_trigger_error', true ) ) {