+ $descriptionLines = explode(PHP_EOL, $description);
+ $descriptionOut = '';
+ $codeBlockOn = false;
+ $lineCount = 0;
+
+ foreach ($descriptionLines as $descriptionLine) {
+ // Detect line of code
+ $codeLineOn = preg_match('/^ /', $descriptionLine) > 0;
+ // Detect and toggle block of code
+ if (!$codeBlockOn) {
+ $codeBlockOn = preg_match('/^```/', $descriptionLine) > 0;
+ }
+ elseif (preg_match('/^```/', $descriptionLine) > 0) {
+ $codeBlockOn = false;
+ }
+
+ $hashtagTitle = ' title="Hashtag [^"]+"';
+ // Reverse `inline code` hashtags.
+ $descriptionLine = preg_replace(
+ '!(`[^`\n]*)<a href="[^ ]*"'. $hashtagTitle .'>([^<]+)</a>([^`\n]*`)!m',
+ '$1$2$3',
+ $descriptionLine
+ );
+
+ // Reverse hashtag links if we're in a code block.
+ $hashtagFilter = ($codeBlockOn || $codeLineOn) ? $hashtagTitle : '';
+ $descriptionLine = preg_replace(
+ '!<a href="[^ ]*"'. $hashtagFilter .'>([^<]+)</a>!m',
+ '$1',
+ $descriptionLine
+ );
+
+ $descriptionOut .= $descriptionLine;
+ if ($lineCount++ < count($descriptionLines) - 1) {
+ $descriptionOut .= PHP_EOL;
+ }
+ }
+ return $descriptionOut;