regex101: PCRE (Legacy) Match Workspace

<emphasis role="strong">the literal text <emphasis role="strong"> (case sensitive)

Group 1(.*)

.*any character, repeated any number of times

Code<the literal text Code< (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

emphasis>the literal text emphasis> (case sensitive)

\s*any whitespace character, repeated any number of times

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

para>the literal text para> (case sensitive)

\s*any whitespace character, repeated any number of times

<programlistingthe literal text <programlisting (case sensitive)

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

Group 2(language="(.*)")?

?repeats the group contents below at most once:

language="the literal text language=" (case sensitive)

Group 3(.*)

.*any character, repeated any number of times

"the literal " (34₁₀ / 42₈ / 22₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

\s*any whitespace character, repeated any number of times

Group 4(.*)

.*any character, repeated any number of times

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

programlisting>the literal text programlisting> (case sensitive)

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

U modifier: Ungreedy. Quantifiers are lazy by default. A trailing ? makes a quantifier greedy

s modifier: single line. Allows a dot to match line terminators

g modifier: global. Finds all matches instead of stopping after the first

Search reference

Regular Expression

<emphasis role="strong">(.*) Code<\/emphasis>\s*<\/para>\s*<programlisting ?(language="(.*)")?>\s*(.*)<\/programlisting>

New

    <section id="foo">
      <title>Code about Bears</title>

      <para>Words</para>
    
      <para><emphasis role="strong">Python Code</emphasis></para>
	  <programlisting language="py">import bears</programlisting>

      <para><emphasis role="strong">JavaScript Code</emphasis></para>
	  <programlisting language="js">var bear = require('bears');</programlisting>
	
	  <section id="bar">
	    <title>Code about Bear Cubs</title>

	    <para>Words</para>
	
	    <para><emphasis role="strong">Python Code</emphasis></para>
		<programlisting language="py">import cubs</programlisting>

	    <para><emphasis role="strong">JavaScript Code</emphasis></para>
		<programlisting language="js">var cub = require('cubs');</programlisting>
	  </section>
    </section>