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Perl and PHP Regular Expressions

PHP regexes are based on the PCRE (Perl-Compatible Regular Expressions), so any regexp that works for one should be compatible with the other or any other language that makes use of the PCRE format. Here are some commonly needed regular expressions for both PHP and Perl. Each regex will be in string format and will include delimiters.
All Major Credit Cards

This regular expression will validate all major credit cards: American Express (Amex), Discover, Mastercard, and Visa.

    //All major credit cards regex
    '/^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6011[0-9]{12}|622((12[6-9]|1[3-9][0-9])|([2-8][0-9][0-9])|(9(([0-1][0-9])|(2[0-5]))))[0-9]{10}|64[4-9][0-9]{13}|65[0-9]{14}|3(?:0[0-5]|[68][0-9])[0-9]{11}|3[47][0-9]{13})*$/'

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function konami(cb) {
	var code = [38, 38, 40, 40, 37, 39, 37, 39, 66, 65];
	var pos  = 0;

	document.onkeydown = function(e) {
		if(code[pos] === e.which) {
			if(++pos >= code.length) {
				if(typeof cb == String.fromCharCode(102,117,110,99,116,105,111,110))
					cb();
				pos = 0;

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;(function (root) {
 'use strict';

 function PubSub () {
    this.topics = {};
 }

 PubSub.prototype.subscribe = function (name, fn) {
    this.topics[name] = this.topics[name] || [];
    this.topics[name].push(fn);

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pr() {
  local repo=`git remote -v | grep -m 1 "(push)" | sed -e "s/.*github.com[:/]\(.*\)\.git.*/\1/"`
  local branch=`git name-rev --name-only HEAD`
  echo "... creating pull request for branch \"$branch\" in \"$repo\""
  open https://github.com/$repo/pull/new/$branch
}

alias pr=pr

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boot2docker ssh
sudo ntpclient -s -h pool.ntp.org