{"id":19010750,"date":"2026-09-03T14:16:45","date_gmt":"2026-09-03T14:16:45","guid":{"rendered":"https:\/\/wordpress.org\/support\/topic\/fatal-error-on-php-8-unsupported-operand-types-int-string\/"},"modified":"2026-09-03T14:16:45","modified_gmt":"2026-09-03T14:16:45","slug":"fatal-error-on-php-8-unsupported-operand-types-int-string","status":"publish","type":"topic","link":"https:\/\/wordpress.org\/support\/topic\/fatal-error-on-php-8-unsupported-operand-types-int-string\/","title":{"rendered":"Fatal error on PHP 8+ &#8220;Unsupported operand types: int + string&#8221;"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Hi,<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I&#8217;m getting a fatal error on my site (hosted on Cloudways) coming from this plugin:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>PHP Fatal error: Uncaught TypeError: Unsupported operand types: int + string in\n\/wp-content\/plugins\/woo-ultimate-order-combination\/inc\/functions.php:666<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">This looks like a PHP 8+ compatibility issue: the code at line 666 is adding an integer and a string with the <code>+<\/code> operator, and one of the values is apparently not numeric (e.g. an empty string or <code>null<\/code>). On PHP 7.x this would just throw a warning and treat the string as <code>0<\/code>, but on PHP 8+ it&#8217;s a fatal <code>TypeError<\/code>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Could you take a look at line 666 of <code>inc\/functions.php<\/code> and add a proper type cast (<code>(int)<\/code>\/<code>(float)<\/code>) or an <code>is_numeric()<\/code> check before the addition?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Environment:<\/p>\n\n\n\n<ul>\n<li>WordPress + WooCommerce (Cloudways hosting)<\/li>\n\n\n\n<li>PHP version: 8.3<\/li>\n\n\n\n<li>Plugin version: 2.0.6<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Happy to provide more details (full stack trace, steps to reproduce) if needed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thanks!<\/p>\n","protected":false},"template":"","class_list":["post-19010750","topic","type-topic","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19010750","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic"}],"about":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19010750\/revisions"}],"wp:attachment":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/media?parent=19010750"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}