Regular Expressions 101

Pro

Negated Character Class[^\W_]+

+matches at least one character outside the set below:

\Wany non-word character

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Positive Lookahead(?=_)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

[^\W_]+(?=_)

New

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