A validator/parser for math expressions. Written on PCRE regex. To change settings, change the 0 to 1 or 1 to 0 after a setting, example: (?){1} to disable, change to (?){0}

Extract a url from as string

Using exactly four 9s and no other digits, write an equation which evaluates to 100

except russian, greek and arabic alphabets.

regex for changing recording path

Two words, each word first letter capital

Geolocalisation: Degrés Minutes Secondes E/O

Converts pages tag into Iwpages template (MediaWiki - wikisource - proofread extension)

Check if a string starts with a letter and ends with a backslash