\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{Dave Child (DaveChild)}
\pdfinfo{
  /Title (regular-expressions.pdf)
  /Creator (Cheatography)
  /Author (Dave Child (DaveChild))
  /Subject (Regular Expressions Cheat Sheet)
}

% Lengths and widths
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\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{C10443}
\definecolor{LightBackground}{HTML}{FBEFF3}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Regular Expressions Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Dave Child (DaveChild)} via \textcolor{DarkBackground}{\uline{cheatography.com/1/cs/5/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Dave Child (DaveChild) \\
  \uline{cheatography.com/davechild} \\
        \uline{\seqsplit{aloneonahill}.com}
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 19th October, 2011.\\
   Updated 12th March, 2020.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{3}

\begin{tabularx}{5.377cm}{p{0.4977 cm} x{4.4793 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Anchors}}  \tn
% Row 0
\SetRowColor{LightBackground}
\textasciicircum{} & Start of string, or start of line in multi-line pattern \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\textbackslash{}A & Start of string \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\$ & End of string, or end of line in multi-line pattern \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
\textbackslash{}Z & End of string \tn 
% Row Count 6 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\textbackslash{}b & Word boundary \tn 
% Row Count 7 (+ 1)
% Row 5
\SetRowColor{white}
\textbackslash{}B & Not word boundary \tn 
% Row Count 8 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\textbackslash{}\textless{} & Start of word \tn 
% Row Count 9 (+ 1)
% Row 7
\SetRowColor{white}
\textbackslash{}\textgreater{} & End of word \tn 
% Row Count 10 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.54747 cm} x{4.42953 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Character Classes}}  \tn
% Row 0
\SetRowColor{LightBackground}
\textbackslash{}c & Control character \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\textbackslash{}s & White space \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\textbackslash{}S & Not white space \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\textbackslash{}d & Digit \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\textbackslash{}D & Not digit \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
\textbackslash{}w & Word \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\textbackslash{}W & Not word \tn 
% Row Count 7 (+ 1)
% Row 7
\SetRowColor{white}
\textbackslash{}x & Hexadecimal digit \tn 
% Row Count 8 (+ 1)
% Row 8
\SetRowColor{LightBackground}
\textbackslash{}O & Octal digit \tn 
% Row Count 9 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.04057 cm} x{2.93643 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{POSIX}}  \tn
% Row 0
\SetRowColor{LightBackground}
\{\{nobreak\}\}{[}:upper:{]} & Upper case letters \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\{\{nobreak\}\}{[}:lower:{]} & Lower case letters \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\{\{nobreak\}\}{[}:alpha:{]} & All letters \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
\{\{nobreak\}\}{[}:alnum:{]} & Digits and letters \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\{\{nobreak\}\}{[}:digit:{]} & Digits \tn 
% Row Count 10 (+ 2)
% Row 5
\SetRowColor{white}
\{\{nobreak\}\}{[}:xdigit:{]} & Hexadecimal digits \tn 
% Row Count 12 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\{\{nobreak\}\}{[}:punct:{]} & Punctuation \tn 
% Row Count 14 (+ 2)
% Row 7
\SetRowColor{white}
\{\{nobreak\}\}{[}:blank:{]} & Space and tab \tn 
% Row Count 16 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\{\{nobreak\}\}{[}:space:{]} & Blank characters \tn 
% Row Count 18 (+ 2)
% Row 9
\SetRowColor{white}
\{\{nobreak\}\}{[}:cntrl:{]} & Control characters \tn 
% Row Count 20 (+ 2)
% Row 10
\SetRowColor{LightBackground}
\{\{nobreak\}\}{[}:graph:{]} & Printed characters \tn 
% Row Count 22 (+ 2)
% Row 11
\SetRowColor{white}
\{\{nobreak\}\}{[}:print:{]} & Printed characters and spaces \tn 
% Row Count 24 (+ 2)
% Row 12
\SetRowColor{LightBackground}
\{\{nobreak\}\}{[}:word:{]} & Digits, letters and underscore \tn 
% Row Count 26 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.44333 cm} x{3.53367 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Assertions}}  \tn
% Row 0
\SetRowColor{LightBackground}
?= & Lookahead assertion \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
?! & Negative lookahead \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
?\textless{}= & Lookbehind assertion \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
?!= or ?\textless{}! & Negative lookbehind \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
?\textgreater{} & Once-only Subexpression \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
?() & Condition {[}if then{]} \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
?()| & Condition {[}if then else{]} \tn 
% Row Count 7 (+ 1)
% Row 7
\SetRowColor{white}
?\# & Comment \tn 
% Row Count 8 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.4177 cm} x{1.29487 cm} p{0.87717 cm} x{1.58726 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{5.377cm}}{\bf\textcolor{white}{Quantifiers}}  \tn
% Row 0
\SetRowColor{LightBackground}
* & 0 or more & \{3\} & Exactly 3 \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
+ & 1 or more & \{3,\} & 3 or more \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
? & 0 or 1 & \{3,5\} & 3, 4 or 5 \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}----}
\SetRowColor{LightBackground}
\mymulticolumn{4}{x{5.377cm}}{Add a ? to a quantifier to make it ungreedy.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}----}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.4977 cm} x{4.4793 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Escape Sequences}}  \tn
% Row 0
\SetRowColor{LightBackground}
\textbackslash{} & Escape following character \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\textbackslash{}Q & Begin literal sequence \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\textbackslash{}E & End literal sequence \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{"Escaping" is a way of treating characters which have a special meaning in regular expressions literally, rather than as special characters.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{1.04425 cm} p{1.04425 cm} p{1.04425 cm} p{1.04425 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{5.377cm}}{\bf\textcolor{white}{Common Metacharacters}}  \tn
% Row 0
\SetRowColor{LightBackground}
\textasciicircum{} & {[} & . & \$ \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\{ & * & ( & \textbackslash{} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
+ & ) & | & ? \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\textless{} & \textgreater{} &  &  \tn 
% Row Count 4 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}----}
\SetRowColor{LightBackground}
\mymulticolumn{4}{x{5.377cm}}{The escape character is usually \textbackslash{}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}----}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.84609 cm} x{4.13091 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Special Characters}}  \tn
% Row 0
\SetRowColor{LightBackground}
\textbackslash{}n & New line \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\textbackslash{}r & Carriage return \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\textbackslash{}t & Tab \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\textbackslash{}v & Vertical tab \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\textbackslash{}f & Form feed \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
\textbackslash{}xxx & Octal character xxx \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\textbackslash{}xhh & Hex character hh \tn 
% Row Count 7 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{0.84609 cm} x{4.13091 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Groups and Ranges}}  \tn
% Row 0
\SetRowColor{LightBackground}
. & Any character except new line (\textbackslash{}n) \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
(a|b) & a or b \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
(...) & Group \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
\seqsplit{(?:...)} & Passive (non-capturing) group \tn 
% Row Count 6 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{[}abc{]} & Range (a or b or c) \tn 
% Row Count 7 (+ 1)
% Row 5
\SetRowColor{white}
{[}\textasciicircum{}abc{]} & Not (a or b or c) \tn 
% Row Count 8 (+ 1)
% Row 6
\SetRowColor{LightBackground}
{[}a-q{]} & Lower case letter from a to q \tn 
% Row Count 9 (+ 1)
% Row 7
\SetRowColor{white}
{[}A-Q{]} & Upper case letter from A to Q \tn 
% Row Count 10 (+ 1)
% Row 8
\SetRowColor{LightBackground}
{[}0-7{]} & Digit from 0 to 7 \tn 
% Row Count 11 (+ 1)
% Row 9
\SetRowColor{white}
\textbackslash{}x & Group/subpattern number "x" \tn 
% Row Count 12 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Ranges are inclusive.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{0.84609 cm} x{4.13091 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Pattern Modifiers}}  \tn
% Row 0
\SetRowColor{LightBackground}
g & Global match \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
i~* & Case-insensitive \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
m~* & Multiple lines \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
s~* & Treat string as single line \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
x~* & Allow comments and whitespace in pattern \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
e~* & Evaluate replacement \tn 
% Row Count 11 (+ 2)
% Row 6
\SetRowColor{LightBackground}
U~* & Ungreedy pattern \tn 
% Row Count 13 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{* PCRE modifier}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.4977 cm} x{4.4793 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{String Replacement}}  \tn
% Row 0
\SetRowColor{LightBackground}
\$n & nth non-passive group \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\$2 & "xyz" in /\textasciicircum{}(abc(xyz))\$/ \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\$1 & "xyz" in /\textasciicircum{}(?:abc)(xyz)\$/ \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\$` & Before matched string \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\$' & After matched string \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
\$+ & Last matched string \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\$\& & Entire matched string \tn 
% Row Count 7 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Some regex implementations use \textbackslash{} instead of \$.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}