invalid email abc abc.com valid email address abc@mail.com...

Extracts parts of an URL into regex groups: ((?:(?:http|ftp|ws)s?|sftp):\/\/?)?(group 1): extracts the protocol (+\.+|localhost)(group 2): extracts the hostname (:\d+)?(group 3): extracts the port number ((?:\/\w+)\/)?([\w\-.]++)?(groups 4 & 5)*: extracts the path part (+)?(group 6): extracts the qu...

We're using the same syslog, and we want to display the date, time, and process id that's inside the square brackets. We can read each line of the syslog and pass the contents to the show_time_of_pid function. Fill in the gaps to extract the date, time, and process id from the passed line, and retur...

Suggest a RegEx to checks for the time format of a 12-hour clock, as follows: the hour is between 1 and 12, with no leading zero, followed by a colon, then minutes between 00 and 59, then an optional space, and then AM or PM, in upper or lower case

Match : '+' at start. ' ' | '.' | '-' between number. Between 7 and 24 numbers. Work with HTML5 pattern.

The password must contain : Between 8 and 24 chars 1 lowercase 1 uppercase 1 number 1 special char...

All characters have to be the same Matches non-primes

PS: It catches undesired strings if they have a dot in the middle, for example "test.test", because it's not checking if ".test" is a real domain extension. You can improve the solution by checking all the possible domain extensions: https://en.wikipedia.org/wiki/List_of_Internet_top-level_domains

Instagram post, reel, tv Regex for PHP

\(#.*?\)

The get-time regex checks for the time format of a 12-hour clock, as follows: the hour is between 1 and 12, with no leading zero, followed by a colon, then minutes between 00 and 59, then an optional space, and then AM or PM, in upper or lower case

The get-time regex checks for the time format of a 12-hour clock, as follows: the hour is between 1 and 12, with no leading zero, followed by a colon, then minutes between 00 and 59, then an optional space, and then AM or PM, in upper or lower case

pulls ids out of id-prefaced slugs

Remove all whitespaces. Note: Use /g to test all strings.

Remove locale ending (en-XX to en) Note: Use /g to test all locales.

Telephone number regex

simple mail regex

匹配多个引用格式

This is from "Learning the Vi editor", chapter 6 page 96

Matches all names in a Wikipedia List, excluding names with suffixes (eg. Jr., III, PhD, etc.) or multiple middle names.