Note that '$' is a bad choice for a delimiter in a dynamic filter as you might end up with unintended variables if you use a variable name directly after the delimiter. Variables will be resolved without escaping anything, therefore you also have to be careful not to chose delimiters that appear in the replacement text. For example - '<' should be save, while '?' will sooner or later cause conflicts with $url.
+ '<' should be save, while '?' will sooner or later cause conflicts with $url.The non-standard option letter T (trivial) prevents parsing for backreferences in the - substitute. Use it if you want to include text like '$&' in your substitute without quoting.
+ substitute. Use it if you want to include text like '$&' in your substitute without quoting.If you are new to "Regular Expressions", you might want to take a look at the Appendix on regular expressions, and see the