Re: Regular expressions

Is there a way to make a regular expression to match on a particular way the letters are arranged? For instance, if you had a word: THAT It could match on any word in the dictionary that had the form: 1231 preg_,match('/^(\w){1}\w\w\1$/'); would match the above on a single line for example, where \1 refers to the pattern captured in parentheses at the start. Try and be a little more specific in what you want to match, as regex is hard enough to start with - a detailed and clear description will elicit corresponding responses.