Title: Debug Errors for deprecated PHP functions Last modified: April 3, 2025 --- # Debug Errors for deprecated PHP functions * [jrthor2](https://wordpress.org/support/users/jrthor2/) * (@jrthor2) * [1 year, 1 month ago](https://wordpress.org/support/topic/debug-errors-for-deprecated-php-functions/) * I am seeing the below errors when i have my site in debug mode. * ```wp-block-code [03-Apr-2025 12:45:31 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Podcasts_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-podcasts-attribute.php on line 28[03-Apr-2025 12:45:31 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Tags_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-tags-attribute.php on line 28[03-Apr-2025 12:45:35 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Podcasts_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-podcasts-attribute.php on line 28[03-Apr-2025 12:45:35 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Tags_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-tags-attribute.php on line 28[03-Apr-2025 12:45:35 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Podcasts_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-podcasts-attribute.php on line 28[03-Apr-2025 12:45:35 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Tags_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-tags-attribute.php on line 28[03-Apr-2025 12:45:35 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Podcasts_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-podcasts-attribute.php on line 28[03-Apr-2025 12:45:35 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Tags_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-tags-attribute.php on line 28[03-Apr-2025 12:45:44 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Podcasts_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-podcasts-attribute.php on line 28[03-Apr-2025 12:45:44 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Tags_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-tags-attribute.php on line 28[03-Apr-2025 12:45:46 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Podcasts_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-podcasts-attribute.php on line 28[03-Apr-2025 12:45:46 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Tags_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-tags-attribute.php on line 28[03-Apr-2025 12:45:47 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Podcasts_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-podcasts-attribute.php on line 28[03-Apr-2025 12:45:47 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Tags_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-tags-attribute.php on line 28[03-Apr-2025 12:45:47 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Podcasts_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-podcasts-attribute.php on line 28[03-Apr-2025 12:45:47 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Tags_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-tags-attribute.php on line 28[03-Apr-2025 12:46:30 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Podcasts_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-podcasts-attribute.php on line 28[03-Apr-2025 12:46:30 UTC] PHP Deprecated: Return type of SeriouslySimplePodcasting\Entities\Available_Tags_Attribute::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/customer//public_html/wp-content/plugins/seriously-simple-podcasting/php/classes/entities/class-available-tags-attribute.php on line 28 ``` * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fdebug-errors-for-deprecated-php-functions%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 5 replies - 1 through 5 (of 5 total) * [Laura Yeffeth](https://wordpress.org/support/users/lyeffeth/) * (@lyeffeth) * [1 year, 1 month ago](https://wordpress.org/support/topic/debug-errors-for-deprecated-php-functions/#post-18403286) * I also see these errors after updating PHP to 8.1. * Plugin Author [Serhiy Zakharchenko](https://wordpress.org/support/users/zahardoc/) * (@zahardoc) * [1 year, 1 month ago](https://wordpress.org/support/topic/debug-errors-for-deprecated-php-functions/#post-18407677) * Hi [@jrthor2](https://wordpress.org/support/users/jrthor2/), Thank you for reporting this issue. It will be fixed in the next plugin versions. * [Laura Yeffeth](https://wordpress.org/support/users/lyeffeth/) * (@lyeffeth) * [1 year, 1 month ago](https://wordpress.org/support/topic/debug-errors-for-deprecated-php-functions/#post-18409306) * Great, thank you! * [psimatrix](https://wordpress.org/support/users/psimatrix/) * (@psimatrix) * [1 year, 1 month ago](https://wordpress.org/support/topic/debug-errors-for-deprecated-php-functions/#post-18418022) * Any ETA on resolving these issues? They aren’t hard to patch. * Plugin Author [Serhiy Zakharchenko](https://wordpress.org/support/users/zahardoc/) * (@zahardoc) * [1 year, 1 month ago](https://wordpress.org/support/topic/debug-errors-for-deprecated-php-functions/#post-18421789) * Hi [@psimatrix](https://wordpress.org/support/users/psimatrix/), This issue has been fixed in 3.10.0. Could you please check if the fix works for you? Viewing 5 replies - 1 through 5 (of 5 total) The topic ‘Debug Errors for deprecated PHP functions’ is closed to new replies. * ![](https://ps.w.org/seriously-simple-podcasting/assets/icon-256x256.png?rev= 970355) * [Seriously Simple Podcasting](https://wordpress.org/plugins/seriously-simple-podcasting/) * [Support Threads](https://wordpress.org/support/plugin/seriously-simple-podcasting/) * [Active Topics](https://wordpress.org/support/plugin/seriously-simple-podcasting/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/seriously-simple-podcasting/unresolved/) * [Reviews](https://wordpress.org/support/plugin/seriously-simple-podcasting/reviews/) * 5 replies * 4 participants * Last reply from: [Serhiy Zakharchenko](https://wordpress.org/support/users/zahardoc/) * Last activity: [1 year, 1 month ago](https://wordpress.org/support/topic/debug-errors-for-deprecated-php-functions/#post-18421789) * Status: not resolved