Title: PHP crash when deactivating plugin Last modified: April 4, 2023 --- # PHP crash when deactivating plugin * Resolved [FormulaRon](https://wordpress.org/support/users/formularon/) * (@formularon) * [3 years, 1 month ago](https://wordpress.org/support/topic/php-crash-when-deactivating-plugin/) * Hello Support, * I’ve stumbled across a similar PHP error that others have reported previously. Not when using but when deactivating the plugin. * I get the following crash reported… * ```wp-block-code ordPress version 6.2 Active theme: Twenty Fourteen Child 2023 (version 23.03.01) Current plugin: WP-Optimize - Clean, Compress, Cache (version 3.2.14) PHP version 8.1.16 Error Details ============= An error of type E_ERROR was caused in line 161 of the file /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/vendor/rosell-dk/webp-convert/src/Convert/Converters/ImageMagick.php. Error message: Uncaught Error: Call to undefined function WebPConvert\Convert\Converters\escapeshellarg() in /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/vendor/rosell-dk/webp-convert/src/Convert/Converters/ImageMagick.php:161 Stack trace: #0 /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/vendor/rosell-dk/webp-convert/src/Convert/Converters/ImageMagick.php(252): WebPConvert\Convert\Converters\ImageMagick->createCommandLineOptions('6.9.10-68') #1 /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/vendor/rosell-dk/webp-convert/src/Convert/Converters/ConverterTraits/EncodingAutoTrait.php(57): WebPConvert\Convert\Converters\ImageMagick->doActualConvert() #2 /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/vendor/rosell-dk/webp-convert/src/Convert/Converters/ConverterTraits/EncodingAutoTrait.php(95): WebPConvert\Convert\Converters\ImageMagick->convertTwoAndSelectSmallest() #3 /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/vendor/rosell-dk/webp-convert/src/Convert/Converters/AbstractConverter.php(256): WebPConvert\Convert\Converters\ImageMagick->runActualConvert() #4 /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/vendor/rosell-dk/webp-convert/src/Convert/Converters/AbstractConverter.php(295): WebPConvert\Convert\Converters\AbstractConverter->doConvertImplementation() #5 /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/webp/class-wpo-webp-test-run.php(48): WebPConvert\Convert\Converters\AbstractConverter->doConvert() #6 /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/webp/class-wp-optimize-webp.php(55): WPO_WebP_Test_Run::get_converter_status() #7 /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/webp/class-wp-optimize-webp.php(20): WP_Optimize_WebP->set_converter_status() #8 /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/webp/class-wp-optimize-webp.php(43): WP_Optimize_WebP->__construct() #9 /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/wp-optimize.php(262): WP_Optimize_WebP::get_instance() #10 /home/beggarsf/public_html/wordpress/wp-content/plugins/wp-optimize/wp-optimize.php(1807): WP_Optimize->get_webp_instance() #11 /home/beggarsf/public_html/wordpress/wp-includes/class-wp-hook.php(308): wpo_deactivation_actions(false) #12 /home/beggarsf/public_html/wordpress/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters('', Array) #13 /home/beggarsf/public_html/wordpress/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #14 /home/beggarsf/public_html/wordpress/wp-admin/includes/plugin.php(814): do_action('deactivate_wp-o...', false) #15 /home/beggarsf/public_html/wordpress/wp-admin/plugins.php(209): deactivate_plugins('wp-optimize/wp-...', false, false) #16 {main} thrown ``` Viewing 6 replies - 1 through 6 (of 6 total) * Plugin Support [vupdraft](https://wordpress.org/support/users/vupdraft/) * (@vupdraft) * [3 years, 1 month ago](https://wordpress.org/support/topic/php-crash-when-deactivating-plugin/#post-16626541) * Can you try unchecking the option to create WebP images before deactivating the plugin? * Thread Starter [FormulaRon](https://wordpress.org/support/users/formularon/) * (@formularon) * [3 years, 1 month ago](https://wordpress.org/support/topic/php-crash-when-deactivating-plugin/#post-16628457) * I’ve never enabled “Automatically compress newly-added images” nor for any manual compressions but I do notice that on the “Compress Image” settings… * “**WebP conversion** * No WebP conversion tools are available on your web-server.” * …is displayed and which would then explain the failure to find the function. * There were 2 webp images on the site. I’ve replaced them with jpg’s, but still crashes and I don’t get a stack trace now. * Plugin Contributor [Venkat Raj](https://wordpress.org/support/users/webulous/) * (@webulous) * [3 years, 1 month ago](https://wordpress.org/support/topic/php-crash-when-deactivating-plugin/#post-16628806) * [@formularon](https://wordpress.org/support/users/formularon/) I assume, your hosting provider added PHP’s built in function `escapeshellarg` to `disable_functions` directive for security purposes. You can add `define('WPO_USE_WEBP_CONVERSION', false);` to your `wp-config.php` file to prevent this. * Thread Starter [FormulaRon](https://wordpress.org/support/users/formularon/) * (@formularon) * [3 years, 1 month ago](https://wordpress.org/support/topic/php-crash-when-deactivating-plugin/#post-16629691) * Thanks for that clue. * I’ve added that, and the webp text has disappeared from the Settings. * But it still crashes but with no stack trace. * Plugin Contributor [Venkat Raj](https://wordpress.org/support/users/webulous/) * (@webulous) * [3 years, 1 month ago](https://wordpress.org/support/topic/php-crash-when-deactivating-plugin/#post-16635524) * [@formularon](https://wordpress.org/support/users/formularon/) Could you please provide more information about your server? Do you use clourflare? If you would like to discuss this in private, please send email [support.wpo@updraftplus.com](https://wordpress.org/support/topic/php-crash-when-deactivating-plugin/support.wpo@updraftplus.com?output_format=md) * Thread Starter [FormulaRon](https://wordpress.org/support/users/formularon/) * (@formularon) * [3 years, 1 month ago](https://wordpress.org/support/topic/php-crash-when-deactivating-plugin/#post-16651279) * Hello Venjkat, * No I don’t used Cloudfare. The hosting is with [https://www.uk2.net/](https://www.uk2.net/) here in the UK. [https://www.uk2.net/web-hosting/](https://www.uk2.net/web-hosting/) * I have another site, with a second account with UK2 which also uses WP Optmise. The plugin here is 2 versions earlier and the same issue occurs there as well. * It’s not a show stopper for me. I routinely activate/deactivate those plugins I use infrequently. * Nigel Viewing 6 replies - 1 through 6 (of 6 total) The topic ‘PHP crash when deactivating plugin’ is closed to new replies. * ![](https://ps.w.org/wp-optimize/assets/icon-256x256.png?rev=1552899) * [WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance](https://wordpress.org/plugins/wp-optimize/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-optimize/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-optimize/) * [Active Topics](https://wordpress.org/support/plugin/wp-optimize/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-optimize/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-optimize/reviews/) * 6 replies * 4 participants * Last reply from: [FormulaRon](https://wordpress.org/support/users/formularon/) * Last activity: [3 years, 1 month ago](https://wordpress.org/support/topic/php-crash-when-deactivating-plugin/#post-16651279) * Status: resolved