Regular Expressions 101

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/
\n(-*>)((?:(?!\n-*>).)*)
/
g
\n matches a line-feed (newline) character (ASCII 10)
1st Capturing Group
(-*>)
-
matches the character - with index 4510 (2D16 or 558) literally (case sensitive)
> matches the character > with index 6210 (3E16 or 768) literally (case sensitive)
2nd Capturing Group
((?:(?!\n-*>).)*)
Non-capturing group
(?:(?!\n-*>).)*
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
Negative Lookahead
(?!\n-*>)
Assert that the Regex below does not match
\n matches a line-feed (newline) character (ASCII 10)
-
matches the character - with index 4510 (2D16 or 558) literally (case sensitive)
> matches the character > with index 6210 (3E16 or 768) literally (case sensitive)
. matches any character (except for line terminators)
Global pattern flags
g modifier: global. All matches (don't return after first match)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
g

Test String

Code Generator

Generated Code

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Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report.
For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php