nerdsrescueme

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})*$/'

jwood

namespace :question do

  desc "Update Questions and Tasks to support newly added validations"
  task :update_for_validations => :environment do
    ActiveRecord::Base.transaction do
      # Set question_type to "yesno" for following questions:
      %w(need_long_term_rental need_short_term_rental find_eye_doctor cleaning need_home).each do |identifier|
        q = Question.find_by_identifier(identifier)
        q.update_attributes!(question_type: "yesno") if q.present?
      end