Regular Expressions 101

Non-Capturing Group(?:<select id=\"c1:swfield\" name=\"c1\">.*?)?

?repeats the group contents below at most once:

<select id=the literal text <select id= (case sensitive)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

c1:swfieldthe literal text c1:swfield (case sensitive)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

name=the literal text name= (case sensitive)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

c1the literal text c1 (case sensitive)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

.*?any character, repeated any number of times

<option value=the literal text <option value= (case sensitive)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

.*?any character, repeated any number of times

\"the literal " (34₁₀ / 42₈ / 22₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Group 1(.*?)

.*?any character, repeated any number of times

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

option>the literal text option> (case sensitive)

Non-Capturing Group(?:<\/select>)?

?repeats the group contents below at most once:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

select>the literal text select> (case sensitive)

Global pattern flags

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

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

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

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Search reference

Regular Expression

(?:<select id=\"c1:swfield\" name=\"c1\">.*?)?<option value=\".*?\">(.*?)<\/option>(?:<\/select>)?

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