Title: PHP Warning Last modified: July 3, 2021 --- # PHP Warning * Resolved [Nick Diego](https://wordpress.org/support/users/ndiego/) * (@ndiego) * [4 years, 11 months ago](https://wordpress.org/support/topic/php-warning-295/) * Hi there, * First off, awesome plugin. One of the few that works in the new Site Editor when placed outside of the main post content loop. * I did run into a strange PHP warning. I did a bit of investigation and cannot seem to figure out why it is occurring. * `Warning: DOMDocument::loadHTML(): Empty string supplied as input in .../wp-content/ plugins/simpletoc/plugin.php on line 221` * However, looking at the code on line 221, you could add a failsafe that would resolve this situation if it ever came up. Something like: * ``` function addAnchorAttribute($html){ // remove non-breaking space entites from input HTML $html_wo_nbs = str_replace(" ", " ", $html); if ( ! $html_wo_nbs ) { return $html; } ... ``` * Anyway, just thought I would share. I have manually added the code above and everything works as expected. Thanks again for the plugin. * Best, Nick Viewing 12 replies - 1 through 12 (of 12 total) * Plugin Author [Marc Tönsing](https://wordpress.org/support/users/marcdk/) * (@marcdk) * [4 years, 11 months ago](https://wordpress.org/support/topic/php-warning-295/#post-14622959) * Thank you! Fixed in 4.7 * [igrowtea](https://wordpress.org/support/users/igrowtea/) * (@igrowtea) * [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15012298) * Hi Marc, I’m seeing this same PHP warning in 4.8 but just on one page of the site. Deactivation of the plugin of course removes the warning. * Any suggestions? * Thanks! * Plugin Author [Marc Tönsing](https://wordpress.org/support/users/marcdk/) * (@marcdk) * [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15012323) * The exact same error? I will look into it * [igrowtea](https://wordpress.org/support/users/igrowtea/) * (@igrowtea) * [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15012412) * Well, it’s not exactly the same, but it’s close. * Warning: DOMDocument::loadHTML(): Tag mark invalid in Entity, line: 2 in …/wp- content/plugins/simpletoc/plugin.php on line 226 * Page with warning here: [https://leafhousetea.com/caffeine-free-naturally-sweet-rooibos-honeybush-tea-help-you-kick-bad-habits/](https://leafhousetea.com/caffeine-free-naturally-sweet-rooibos-honeybush-tea-help-you-kick-bad-habits/) * Plugin Author [Marc Tönsing](https://wordpress.org/support/users/marcdk/) * (@marcdk) * [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15015052) * You use invalid html tags in your content: * `bush teas` * I will prevent messages like this to appear in the future. But this error happens because your HTML contains invalid tags * Plugin Author [Marc Tönsing](https://wordpress.org/support/users/marcdk/) * (@marcdk) * [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15015070) * Can you please check if you copy this [https://raw.githubusercontent.com/mtoensing/simpletoc/master/plugin.php](https://raw.githubusercontent.com/mtoensing/simpletoc/master/plugin.php) to the plugin.php in your SimpleTOC plugin folder in /wp-content/plugins/simpletoc/ if the error is gone? * [igrowtea](https://wordpress.org/support/users/igrowtea/) * (@igrowtea) * [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15015449) * Copied your update to the plugin folder but the error message is still showing in Chrome incognito and private Safari. However, SimpleTOC works as it should. * Plugin Author [Marc Tönsing](https://wordpress.org/support/users/marcdk/) * (@marcdk) * [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15015477) * Thank you for testing. Please try again: * [https://raw.githubusercontent.com/mtoensing/simpletoc/master/plugin.php](https://raw.githubusercontent.com/mtoensing/simpletoc/master/plugin.php) * The change is in line 227 [https://github.com/mtoensing/simpletoc/blob/master/plugin.php#L227](https://github.com/mtoensing/simpletoc/blob/master/plugin.php#L227) * [igrowtea](https://wordpress.org/support/users/igrowtea/) * (@igrowtea) * [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15015517) * Sorry, Marc, but the message is still there. * I appreciate that you’re trying! Thank you. * [igrowtea](https://wordpress.org/support/users/igrowtea/) * (@igrowtea) * [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15015658) * I’ve also deleted the invalid html and yet the warning still appears. Hm. * Plugin Author [Marc Tönsing](https://wordpress.org/support/users/marcdk/) * (@marcdk) * [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15015866) * I don’t see the message anymore on your link * [igrowtea](https://wordpress.org/support/users/igrowtea/) * (@igrowtea) * [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15015945) * I see that now but since I’ve deleted the bad HTML we won’t know if your PHP update was effective. * Thank you in any case! Viewing 12 replies - 1 through 12 (of 12 total) The topic ‘PHP Warning’ is closed to new replies. * ![](https://ps.w.org/simpletoc/assets/icon.svg?rev=2796116) * [SimpleTOC - Table of Contents Block](https://wordpress.org/plugins/simpletoc/) * [Frequently Asked Questions](https://wordpress.org/plugins/simpletoc/#faq) * [Support Threads](https://wordpress.org/support/plugin/simpletoc/) * [Active Topics](https://wordpress.org/support/plugin/simpletoc/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/simpletoc/unresolved/) * [Reviews](https://wordpress.org/support/plugin/simpletoc/reviews/) * 12 replies * 3 participants * Last reply from: [igrowtea](https://wordpress.org/support/users/igrowtea/) * Last activity: [4 years, 7 months ago](https://wordpress.org/support/topic/php-warning-295/#post-15015945) * Status: resolved