In this post I'm gonna collect some useful resources in order to learn and play with regular expressions.
Because I once again updated the Regular Expressions in PHP article in order to extend the list of tools and resources, I decided to dedicate a full post to these. So in the future I will just update this list of resources.
Regular-Expressions.info (opens new window) is a good starting point in order to learn about regular expressions. Also it is pointing you to further resources if you want to dig deeper into the topic.
Regex101.com (opens new window) is my favorite tool to debug complex regular expressions that I'm struggling with. I can really recommend this one!
regexr.com (opens new window) is another very useful tool in order to explore your regular expressions.
regex-tester (opens new window) is another very useful tool in order to explore your regular expressions ...