Added a new function that removes HTML tags from a string

Author: sebprt

src/StringExpressionLanguageProvider.php

@@ -21,6 +21,7 @@ public function getFunctions(): array
             ExpressionFunction::fromPhp('number_format', 'formatNumber'),
             ExpressionFunction::fromPhp('strpos', 'indexOf'),
             ExpressionFunction::fromPhp('str_replace', 'replace'),
+            ExpressionFunction::fromPhp('strip_tags', 'clean_up_html'),
             new FileName('fileName'),
             new DateTime('dateTime'),
             new FormatDate('formatDate'),