Shulou(Shulou.com)06/03 Report--

This article mainly introduces "the function of php regular expression". In daily operation, I believe that many people have doubts about the function of php regular expression. The editor consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "the function of php regular expression". Next, please follow the editor to study!

1. The role of regular expressions: split, find, match, replace strings

two。 Delimiters: forward slash (/), hash (#), and reverse symbol (~).

3. General atom:\ d\ D\ s\ S\ w\ W

4. Atomic symbol

5. Pattern modifier

6. Backward reference

7. Greedy mode

8. Regular expression PCRE functions prge_match (), preg_match_all (), preg_replace (), preg () _ split ().

Problem-solving method

Write a string to match

Splicing using atoms and metacharacters of regular expressions in left-to-right order

Finally add the correction mode.

Practice common regular expressions (mobile phone number, ID card, email,url, etc.)

Mobile phone number at the beginning of 139

$str = '13988888888); match ($partten, str, $partten); var_dump ($match)

Take out the sr value of all img tags in the html page

$str ='

'; $partten =' / iPredictive match ($partten, $str, $match); var_dump ($march); at this point, the study of "the role of php regular expressions" is over, hoping to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.