Matches any valid JSON object, matches recursively. Passes all JSON test cases I found.

Use this regex to select all characters up to the "" bracket. It works across multiple lines. You can get an email list with only the IDs. This is the pattern it matches: Alpha Person Step 1 (.*) [$ Step 2 [$.$] (.*) gives you aperson@whatever.org...

global modifier

By Using this string you can just remove ascii special characters from a unicode string characters like ♥♥♥♥ ▓▒ and other non unicode letters.

1-15 alphanumeric login name

A quite neat regular expression for URLs, e-mails..., I found on Matthew O'Riordan's blog.

Check for true or false street address format

For scraping http://skepticsannotatedbible.com/

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

grabs the ID for the regex101.com permalink to code