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 year. Thus years 2100, 2200, and 2300 are not leap years but years 2000, 2400, and 2800 are.

Date with this format YYYY-MM-DD and year start 20 or 21 like 2014

Tests the string if it does contain valid latitude and longitude parameters

This is a sample text for use at my "Working With Data" workshop session on regular expressions.

]+)\s()\s(?:\/>|>(.)) - (with global) finds all tags in scope 1st group is tagname 2nd group is attributes 3rd group (if it exists) is value of the tag Apply pattern again on 3th group to find internal tags (recurse in the code to parse entire xml!) Apply pattern below on 2nd group to find all attributes: \s+(+)\s=\s"(*)" - (with global) finds attributes 1st group is attributename 2nd group is attributevalue

Matches any IPv4 address

Exclude part of a string in an include string.

This search for special character at first position in the string

matching words between square brachets tags include newline or carriage return

Matches HTML structure

gets a postgis tablename from a mapfile with the given layer name, may not work depending on your mapfile layout

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