With regex you can count the number of matches. Can you make it return the number of uppercase consonants (B,C,D,F,..,X,Y,Z) in a given string? E.g.: it should return 3 with the text ABcDeFO!. Note: Only ASCII. We consider Y to be a consonant! Example: the regex /./g will return 3 when run against t...

See http://www.php.net/manual/en/reflectionparameter.tostring.php

Validate Gregorian calendar dates that contain 24-hour times. This will also correctly match the Feb 29 date when it falls on a valid leap year. Leap years occur every 4 years, with one exception: when a year is evenly divisible by 100 but not evenly divisible by 400, the year will not be a leap ye...

Validate and Capture (in 1000-2999 range) Leap-Year Correct

Finds a happy smile, except sad one

Need Help, Matching Multiline Strings in Large Text File

improved "Ahmed Z" regexp. PHP date format (and input[type=text] format date too): YYYY-MM-DD. Year between [1900-2099]. No leap year check. Month 02 is limited to 29 days.

youtube id 17 matches

Validates a date with ISO 8601 format. Source: http://www.pelagodesign.com/blog/2009/05/20/iso-8601-date-validation-that-doesnt-suck/

It correctly handles simple values, empty values, and quoted values with commas inside.

little matcher for french phone number in international format (example: +33231348228)

white space before punctuations, outside script and code tags

Valid 0.0.0.0 1.1.1.1 101.101.101.101 255.255.255.255 156.0.1.10...

This is not supported in Javascript! Works well for php, python. Examples: +91-8800119719, 08800119719, 8800119719, +918800119719 etc.

Validate IPv4 addresses using PCRE's recursion patterns. A shorter but less efficient alternative to https://regex101.com/r/wZ6oY5/1

Useful to work with GoogleMap API.