Title: Problem on activation, it's using old widget code
Last modified: August 31, 2016

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# Problem on activation, it's using old widget code

 *  [Martin](https://wordpress.org/support/users/fpvtv/)
 * (@fpvtv)
 * [10 years, 5 months ago](https://wordpress.org/support/topic/problem-on-activation-its-using-old-widget-code/)
 * On activation it shows>>
 * Notice: The called constructor method for WP_Widget is deprecated since version
   4.3.0! Use
    __construct() instead. in xxxwp-includes/functions.php on line 3619
 * Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback,
   non-static method collapsCat::init_textdomain() should not be called statically
   in /xxxxpx/wp-includes/plugin.php on line 525
 * Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback,
   non-static method collapsCat::add_scripts() should not be called statically in/
   xxxxxxx/wp-includes/plugin.php on line 525
 * Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback,
   non-static method collapsCat::get_head() should not be called statically in /
   xxxx/wp-includes/plugin.php on line 525
 * And also many onther problems on main page like The called constructor method
   for WP_Widget is deprecated since version 4.3.0!
 * [https://wordpress.org/plugins/collapsing-categories/](https://wordpress.org/plugins/collapsing-categories/)

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 * 0 replies
 * 1 participant
 * Last reply from: [Martin](https://wordpress.org/support/users/fpvtv/)
 * Last activity: [10 years, 5 months ago](https://wordpress.org/support/topic/problem-on-activation-its-using-old-widget-code/)
 * Status: not resolved