Title: receiving error on widget.php Last modified: August 20, 2016 --- # receiving error on widget.php * [Helen-kh](https://wordpress.org/support/users/helen-kh/) * (@helen-kh) * [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/) * Hi, * I am supposed to update a wordpress site which was made in 2009. * I have created a new theme based on twentyeleven on my local server and it is working well on my machine. (I changed some html/css only) then I uploaded only the theme to the server in the theme folder. I was expecting to activate the new theme and be able to see it on the site. when I activated the new theme, it gave me error in something with widget.php. * So, once I compared the old widget.php with my new widget.php, I noticed they MIGHT BE slightly different. * So, I switched the old widget.php with my new one. Still the site is giving me error with widget.php. So, I switched it back to old widget.php and still not working. when I type the url it gives me this error:Fatal error: Call to undefined function add_theme_support() in /home/wilmax1/public_html/wordpress/wp-includes/ widgets.php on line 561 * Does anybody knows how to solve this issue please? Hope I have explained it OK. If need more info, let me know. * I’d really appreciate it. Viewing 10 replies - 16 through 25 (of 25 total) [←](https://wordpress.org/support/topic/receiving-error-on-widgetphp/?output_format=md) [1](https://wordpress.org/support/topic/receiving-error-on-widgetphp/?output_format=md) 2 * Thread Starter [Helen-kh](https://wordpress.org/support/users/helen-kh/) * (@helen-kh) * [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/page/2/#post-2747823) * So, I am thinking if I get rid of the whole wordpress site and upload a new one and just change the parameters of database in config.php to the current database, it should work. right? * [kmessinger](https://wordpress.org/support/users/kmessinger/) * (@kmessinger) * [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/page/2/#post-2747826) * I think you will need to do an incremental upgrade. * Thread Starter [Helen-kh](https://wordpress.org/support/users/helen-kh/) * (@helen-kh) * [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/page/2/#post-2747828) * The problem is that I can’t get into wp-admin of the site. Wondering if there is a way I can get into that than regular way? * Thread Starter [Helen-kh](https://wordpress.org/support/users/helen-kh/) * (@helen-kh) * [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/page/2/#post-2747830) * So, do you think if I switch he whole site with a new one, I am having problem with database? * [kmessinger](https://wordpress.org/support/users/kmessinger/) * (@kmessinger) * [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/page/2/#post-2747831) * I am not sure. I would think db structure has changed. I think you may need to upgrade incrementally. * [http://codex.wordpress.org/Upgrading_WordPress_Extended#](http://codex.wordpress.org/Upgrading_WordPress_Extended#) has instructions right the top. * Thread Starter [Helen-kh](https://wordpress.org/support/users/helen-kh/) * (@helen-kh) * [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/page/2/#post-2747832) * How can I upgrade when I can’t even get into it? * Can I change the files? * [kmessinger](https://wordpress.org/support/users/kmessinger/) * (@kmessinger) * [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/page/2/#post-2747839) * > I am sure I have put the right version of widget.php and when I looked for > that function in it, there is nothing there. * Maybe you should upload it again. This `Fatal error: Call to undefined function add_theme_support() in /home/wilmax1/public_html/wordpress/wp-includes/widgets. php on line 561` shows it is a newer version of the file. * Thread Starter [Helen-kh](https://wordpress.org/support/users/helen-kh/) * (@helen-kh) * [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/page/2/#post-2747841) * Believe me I have uploaded that version more than 10 times, even I did it through cPanel. * It should be the right one. But before I delete the new theme, when I still could get to the wp-admin I tried to activate theme twentyeleven, and from then everything went wrong and I was out of admin panel. However, I deleted the theme through the server and uploaded the old widget.php. * Well, this was the same story as in the beginning of this thread 🙂 * Thread Starter [Helen-kh](https://wordpress.org/support/users/helen-kh/) * (@helen-kh) * [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/page/2/#post-2747845) * I don’t know what I did, but the site is back 🙂 I am totally confused. Maybe the file was not getting uploaded correctly in my past attempts. But thanks for insisting on checking the file and uploading it again. Now, I need to upgrade. Can you tell me what you mean by upgrading incrementally? Does it mean to 2.9, then to 3, then to 3.1,…? * [esmi](https://wordpress.org/support/users/esmi/) * (@esmi) * [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/page/2/#post-2747934) * Yes. See [Upgrading_WordPress_Extended](http://codex.wordpress.org/Upgrading_WordPress_Extended). Viewing 10 replies - 16 through 25 (of 25 total) [←](https://wordpress.org/support/topic/receiving-error-on-widgetphp/?output_format=md) [1](https://wordpress.org/support/topic/receiving-error-on-widgetphp/?output_format=md) 2 The topic ‘receiving error on widget.php’ is closed to new replies. ## Tags * [Call to undefined function:](https://wordpress.org/support/topic-tag/call-to-undefined-function/) * [php-error](https://wordpress.org/support/topic-tag/php-error/) * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) * 25 replies * 4 participants * Last reply from: [esmi](https://wordpress.org/support/users/esmi/) * Last activity: [14 years ago](https://wordpress.org/support/topic/receiving-error-on-widgetphp/page/2/#post-2747934) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics