Regular Expressions 101

Explanation
Pro

Non-Capturing Group(?:<span id=\"MyId\">|\G)

1st Alternative<span id=\"MyId\">

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

\"the literal " (34₁₀ / 42₈ / 22₁₆)

MyIdthe literal text MyId (case sensitive)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

2nd Alternative\G

\Gstart of current search

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

Group 1([^<>,]+)

Negated Character Class[^<>,]+

+matches at least one character outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

25 tokens

(?:<span id=\"MyId\">|\G),?([^<>,]+)

New

<html>
...
<span id="MyId">string 1,string 2,string 3,strin4,string5,string6</span>
...
</html>

<html>
...
<span id="MyId">string 1,string 2,string 3,strin4,string5,string6</span>
...
</html>