How to target using regular expression?

Regular expression is a powerful way to target complicated URLs or to simplify complex conditions into a single query. How does a regular expression (regex) work? In regular expression you combine literal characters with special characters to create a logical pattern. This logical pattern then defines which URLs will be targeted and which will be out of scope. Literal character = any character of your URL, such as "w" or "/" from "www.examplepage.com/page" Special character = a character having special meaning, such as "\d" means represents any single digit Please note, that some characters common in the URL (such as / or .) is by considered special by regex. Therefore if they are meant literally, it is necessary to always put "\" in front of them. The common URL will then look like "www\.examplepage\.com\/page". Examples of regular expressions Regular expression URLs that will be targeted More information ^www\.examplepage\.com$ An exact match of www.examplepage.com. URLs containing specific pages (such as www.examplepage.com/page) will be excluded! ^ signals that the URL must start there $ signals that the URL must end there examplepage\.com\/id\/\d+\/edit examplepage.com/id//edit All URLs containing "examplepage.com/id/", then number of any length and then "/edit" will be targeted \d represents any digit + signals the previous sign is present one or more times Together (\d+) they mean one or more digits. examplepage\.(com|net) Any URL containing examplepage.com or examplepage.net | signals that word before or word after needs to be there The condition can be put inside of ( ) for better readability. Special characters (essentials) ^ start of string $ end of string a+ one or more of a a* zero or more of a a? zero or one of a a{3} exactly 3x a a{3,} 3x or more of a a{3,5} Between 3x and 5x of a a|b a or b \d any digit \D any non-digit . any single character [abc] a single character from a, b or c [^abc] a single character except a, b or c [a-z] a single character in range from a to z Testing your regular expressions You can use the tool https://regex101.com/ to test your regular expressions.

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