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| -rw-r--r-- | pcre.html.markdown | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/pcre.html.markdown b/pcre.html.markdown index 0ef96fd0..7fd237c8 100644 --- a/pcre.html.markdown +++ b/pcre.html.markdown @@ -6,7 +6,7 @@ contributors: --- -A regular expression (regex or regexp for short) is a special text string for describing a search pattern. e.g. to extract domain name from a string we can say `/^[a-z]+:/` and it will match `http:` from `http://github.com/`. +A regular expression (regex or regexp for short) is a special text string for describing a search pattern. e.g. to extract the protocol from a url string we can say `/^[a-z]+:/` and it will match `http:` from `http://github.com/`. PCRE (Perl Compatible Regular Expressions) is a C library implementing regex. It was written in 1997 when Perl was the de-facto choice for complex text processing tasks. The syntax for patterns used in PCRE closely resembles Perl. PCRE syntax is being used in many big projects including PHP, Apache, R to name a few. |