Title: PHP 8 compatibility Last modified: January 13, 2023 --- # PHP 8 compatibility * Resolved [Frank Gomez](https://wordpress.org/support/users/frank6tg/) * (@frank6tg) * [3 years, 4 months ago](https://wordpress.org/support/topic/php-8-compatibility-93/) * ```wp-block-code I had problems with PHP 8 on this website and the report shows these problems. ..aikidosarasota.com/html/wp-content/plugins/wp-mail-smtp/vendor_prefixed/phpseclib/phpseclib/phpseclib/Crypt/Common/SymmetricKey.php FOUND 26 ERRORS AFFECTING 20 LINES 1142 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 1174 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 1177 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 1182 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 1190 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 1199 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 1201 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 1504 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 1531 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 1536 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 1546 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 2053 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 2150 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 2151 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 2155 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 2251 | ERROR | The constant "MCRYPT_MODE_ECB" is deprecated since PHP 7.1 and removed since PHP 7.2 2251 | ERROR | The constant "MCRYPT_MODE_CBC" is deprecated since PHP 7.1 and removed since PHP 7.2 2251 | ERROR | The constant "MCRYPT_MODE_CFB" is deprecated since PHP 7.1 and removed since PHP 7.2 2251 | ERROR | The constant "MCRYPT_MODE_NOFB" is deprecated since PHP 7.1 and removed since PHP 7.2 2251 | ERROR | The constant "MCRYPT_MODE_OFB" is deprecated since PHP 7.1 and removed since PHP 7.2 2251 | ERROR | The constant "MCRYPT_MODE_STREAM" is deprecated since PHP 7.1 and removed since PHP 7.2 2252 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 2253 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 2258 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead 2258 | ERROR | The constant "MCRYPT_MODE_ECB" is deprecated since PHP 7.1 and removed since PHP 7.2 2263 | ERROR | Extension 'mcrypt' is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available | | instead ``` * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-8-compatibility-93%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 5 replies - 1 through 5 (of 5 total) * [contemplate](https://wordpress.org/support/users/contemplate/) * (@contemplate) * [3 years, 4 months ago](https://wordpress.org/support/topic/php-8-compatibility-93/#post-16373533) * Same here. Just ran a PHP 8 compatibility scan on numerous client sites that use this plugin. This file come up with 26 errors: /wp-mail-smtp/vendor_prefixed/ phpseclib/phpseclib/phpseclib/Crypt/Common/SymmetricKey.phpWhen will this be ready for PHP 8? * [contemplate](https://wordpress.org/support/users/contemplate/) * (@contemplate) * [3 years, 4 months ago](https://wordpress.org/support/topic/php-8-compatibility-93/#post-16373545) * OK apparently this was asked on this thread and the advise was to ignore the errors: [https://wordpress.org/support/topic/php-8-0-compatibility-20/](https://wordpress.org/support/topic/php-8-0-compatibility-20/) Odd this library hasn’t been removed yet from the plugin. * [contemplate](https://wordpress.org/support/users/contemplate/) * (@contemplate) * [3 years, 4 months ago](https://wordpress.org/support/topic/php-8-compatibility-93/#post-16373553) * Well I attempted to upgrade to PHP 8 and the site gave me a critical error so I had to downgrade again. * Thread Starter [Frank Gomez](https://wordpress.org/support/users/frank6tg/) * (@frank6tg) * [3 years, 4 months ago](https://wordpress.org/support/topic/php-8-compatibility-93/#post-16373554) * This is explains why it still works on PHP 8. So I guess it has some reverse compatibility for users who are still using PHP 7.4 * [contemplate](https://wordpress.org/support/users/contemplate/) * (@contemplate) * [3 years, 3 months ago](https://wordpress.org/support/topic/php-8-compatibility-93/#post-16375573) * Nevermind I had another snippet causing the PHP 8 error. This plugin can safely allow for PHP 8. Viewing 5 replies - 1 through 5 (of 5 total) The topic ‘PHP 8 compatibility’ is closed to new replies. * ![](https://ps.w.org/wp-mail-smtp/assets/icon-256x256.png?rev=1755440) * [WP Mail SMTP by WPForms - The Most Popular SMTP and Email Log Plugin](https://wordpress.org/plugins/wp-mail-smtp/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-mail-smtp/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-mail-smtp/) * [Active Topics](https://wordpress.org/support/plugin/wp-mail-smtp/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-mail-smtp/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-mail-smtp/reviews/) * 5 replies * 2 participants * Last reply from: [contemplate](https://wordpress.org/support/users/contemplate/) * Last activity: [3 years, 3 months ago](https://wordpress.org/support/topic/php-8-compatibility-93/#post-16375573) * Status: resolved