regex101: PCRE (Legacy) Match Workspace

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Negative Lookahead(?![^<>]*\/\s*>)

Negated Character Class[^<>]*

*matches any number of characters outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Group 1([a-zA-Z]+)

Character Class[a-zA-Z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Non-Capturing Group(?:\s+[^\/<>"=\s]+(?:=(?:"[^<>"]*"?|[^=<>"\s]*"?)?)?)*

*repeats the group contents below any number of times:

\s+any whitespace character, repeated at least once

Negated Character Class[^\/<>"=\s]+

+matches at least one character outside the set below:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\sany whitespace character

Non-Capturing Group(?:=(?:"[^<>"]*"?|[^=<>"\s]*"?)?)?

?repeats the group contents below at most once:

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Non-Capturing Group(?:"[^<>"]*"?|[^=<>"\s]*"?)?

?repeats the group contents below at most once:

1st Alternative"[^<>"]*"?

"the literal " (34₁₀ / 42₈ / 22₁₆)

Negated Character Class[^<>"]*

*matches any number of characters outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

"?optionally matches the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative[^=<>"\s]*"?

Negated Character Class[^=<>"\s]*

*matches any number of characters outside the set below:

=the literal = (61₁₀ / 75₈ / 3D₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

\sany whitespace character

"?optionally matches the literal " (34₁₀ / 42₈ / 22₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

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

Search reference

Regular Expression

<(?![^<>]*\/\s*>)([a-zA-Z]+)(?:\s+[^\/<>"=\s]+(?:=(?:"[^<>"]*"?|[^=<>"\s]*"?)?)?)*>

Unit Tests

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