regex to match everything until it hits uppercase

Question

I found the following code from this question, regex to match everything until it finds 2 upper case characters?

^.*(?=\b(?:[^\sA-Z]*[A-Z]){2})

however my question is slightly different then the OP

I want to match everything up to the upper case in the following string, the rules should match everything until it negative lookaround finds 2 uppercase characters and then match everything inbetween from the 1st uppercase until the start of the 2nd uppercase character

so I Want (continue from op example)

Http is an HttpHeader

is to get Http is an Http

instead of Http is an which OP is getting in posted thread

Can you clarify your rules? Your example doesn't match your description as matching everything until uppercase would return nothing as the first uppercase is the first character — psubsee2003, Dec 22 '13 at 01:31
Agree with @psubsee2003 -- the result you want contains *two* upper cased characters! — Explosion Pills, Dec 22 '13 at 01:34
possible duplicate of [RegEx to split camelCase or TitleCase (advanced)](http://stackoverflow.com/questions/7593969/regex-to-split-camelcase-or-titlecase-advanced) — mvp, Dec 22 '13 at 02:14
@mvp does not actually work as expected see http://regex101.com/r/bO7aP8 — user1973125, Dec 22 '13 at 02:53

score 0 · Answer 1 · answered Dec 22 '13 at 01:31

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Seems overly comp. to me

preg_match( '/[^A-Z]+/', $str, $res );

answered Dec 22 '13 at 01:31

Kohjah Breese

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score 0 · Answer 2 · answered Dec 22 '13 at 02:15

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preg_match('/[^A-Z]*([A-Z]{1}[^A-Z]*[A-Z]{1}[^A-Z]*)/', $str, $res);

answered Dec 22 '13 at 02:15

Jompper

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score 0 · Answer 3 · answered Dec 22 '13 at 02:56

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use this pattern ^.*?(?=\b(?:[^\sA-Z]*[A-Z]){2}).+?(?=[A-Z]) Demo

answered Dec 22 '13 at 02:56

alpha bravo

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score 0 · Answer 4 · answered Dec 22 '13 at 07:46

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([A-Z].*?\w+(?=[A-Z]))

You may follow the above regex. That's so simple and yet fast. See matched groups here: Live demo

answered Dec 22 '13 at 07:46

revo

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regex to match everything until it hits uppercase

4 Answers4