PHP - String pattern matching

Question

I need to know if there is any way I can do the following using regular expressions (or otherwise) in PHP

aaBaa BBB -> aa Baa BBB

ie, I want to introduce a space before a capital letter only if a Capital letter occurs before and after a small letter.

The best I could come up with was something like this

$string = preg_replace('/(\w+)([A-Z])/U', '\\1 \\2', $string);

but that would only give me something like

aaBaa BBB -> aa Baa B B B

Thanks in advance.

piotrekkr · Accepted Answer · 2011-12-27 09:39:28Z

2

Try this:

preg_replace('|([a-z])([A-Z])([a-z])|', '$1 $2$3', $txt);

answered Dec 27, 2011 at 9:39

piotrekkr

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1 Comment

I thank you for your answer, but I felt @sergei's was better as it taught me how to take care of such things in the future.

Sergio Tulentsev · Accepted Answer · 2011-12-27 10:07:58Z

1

([a-z]+)([A-Z]+)

answered Dec 27, 2011 at 9:31

Sergio Tulentsev

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