Captures all fields from a CSV file's line. Can be customized with user-defined field separator and protecting character.

Validates IPv4 IP Address

Validates - URLs with schemes - http, https and ftp Relative URL starting with / and ../

general purpose HTTP URL regex

This regex will match any Youtube video ID thrown at it and return one capturing group containing the ID.

Matches text within quotes (", ') and escapes the charecters.

Matches single or double quoted strings, and ignores backslash-escaped quotes within the string.

Checks for valid UK/British postcodes. There was another on here that had for some reason been upvoted, but it was actually incorrect as it worked on none of my valid own postcodes! Namely that it assumed two letters and a number (BS3) when you can have variations (M20). Allows for an optional spac...

grabs the ID for the regex101.com permalink to code

Besides leap year handling, this takes care of date validation in the yy-mm-dd format.

Validates DateTime of format YYYY-MM-DD hh:mm:ss including Leap Year

Complete url matching with storage of various parameters

For Validating alphanumeric and numeric range

Valid PHP variable name as defined in the manual at http://php.net/manual/en/language.variables.basics.php

A string with only numbers in

matches: + example: +52 33 3884 7720 +1 770 343 5788