All Services Programming & Development Do PHP Work in in 2 years experience $12/hr · Starting at $50 Regular expressions are a powerful tool for examining and modifying text. Regular expressions themselves, with a general pattern notation almost like a mini programming language, allow you to describe and parse text. They enable you to search for patterns within a string, extracting matches flexibly and precisely. However, you should note that because regular expressions are more powerful, they are also slower than the more basic string functions. You should only use regular expressions if you have a particular need. About $12/hr · Ongoing Download Resume Regular expressions are a powerful tool for examining and modifying text. Regular expressions themselves, with a general pattern notation almost like a mini programming language, allow you to describe and parse text. They enable you to search for patterns within a string, extracting matches flexibly and precisely. However, you should note that because regular expressions are more powerful, they are also slower than the more basic string functions. You should only use regular expressions if you have a particular need. Skills & Expertise BasicPHPProgrammingRegular Expressions 0 Reviews This Freelancer has not received any feedback. Browse Similar Freelance Experts PHP DevelopersComputer ProgrammersDirectory Submission Services