Regular Expressions 101

Pro

^start of line

Non-Capturing Group(?:\+\d{2})?

?repeats the group contents below at most once:

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

\d{2}a digit, repeated exactly 2 times

\d{10}a digit, repeated exactly 10 times

Non-Capturing Group(?:,(?:\+\d{2})?\d{10})*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Non-Capturing Group(?:\+\d{2})?

?repeats the group contents below at most once:

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

\d{2}a digit, repeated exactly 2 times

\d{10}a digit, repeated exactly 10 times

$end of line

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

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26 tokens

^(?:\+\d{2})?\d{10}(?:,(?:\+\d{2})?\d{10})*$

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