Regular Expressions 101

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/
(me)(?!([^<]+)?>)
/
gi
1st Capturing Group
(me)
me
matches the characters me literally (case insensitive)
Negative Lookahead
(?!([^<]+)?>)
Assert that the Regex below does not match
2nd Capturing Group
([^<]+)?
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
Match a single character not present in the list below
[^<]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
< matches the character < with index 6010 (3C16 or 748) literally (case insensitive)
> matches the character > with index 6210 (3E16 or 768) literally (case insensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
i modifier: insensitive. Case insensitive match (ignores case of [a-zA-Z])
Your regular expression does not match the subject string.

Regular Expression
No Match

/
/
gi

Test String

Substitution

Processing...