|
|
Regular expression examples
The
following examples show some regular expressions and describe what
they match:
Expression
|
Description
|
|---|
[\?&]value=
|
A URL parameter value in a URL.
|
[A-Z]:(\\[A-Z0-9_]+)+
|
An uppercase DOS/Windows path in which (a)
is not the root of a drive, and (b) has only letters, numbers, and
underscores in its text.
|
^[A-Za-z][A-Za-z0-9_]*
|
A ColdFusion variable with no qualifier.
|
([A-Za-z][A-Za-z0-9_]*)(\.[A-Za-z][A-Za-z0-9_]*)?
|
A ColdFusion variable with no more than
one qualifier; for example, Form.VarName, but not Form.Image.VarName.
|
(\+|-)?[1-9][0-9]*
|
An integer that does not begin with a zero
and has an optional sign.
|
(\+|-)?[0-9]+(\.[0-9]*)?
|
A real number.
|
(\+|-)?[1-9]\.[0-9]*E(\+|-)?[0-9]+
|
A real number in engineering notation.
|
a{2,4}
|
Two to four occurrences of “a”: aa, aaa,
aaaa.
|
(ba){3,}
|
At least three “ba” pairs: bababa, babababa,
and so on.
|
Regular expressions in CFMLThe following examples of
CFML show some common uses of regular expression functions:
Expression
|
Returns
|
|---|
REReplace (CGI.Query_String, "CFID=[0-9]+[&]*", "")
|
The query string with parameter CFID and
its numeric value stripped out.
|
REReplace("I Love Jellies", "[[:lower:]]","x","ALL"
|
I Lxxx Jxxxxxx
|
REReplaceNoCase("cabaret","[A-Z]", "G","ALL")
|
GGGGGGG
|
REReplace (Report,"\$[0-9,]*\.[0-9]*","$***.**")", "")
|
The string value of the variable Report with
all positive numbers in the dollar format changed to "$***.**".
|
REFind ("[Uu]\.?[Ss]\.?[Aa}\.?", Report )
|
The position in the variable Report of the
first occurrence of the abbreviation USA. The letters can be in
either case and the abbreviation can have a period after any letter.
|
REFindNoCase("a+c","ABCAACCDD")
|
4
|
REReplace("There is is coffee in the the kitchen","([A-Za-z]+)[ ]+\1","*","ALL")
|
There * coffee in * kitchen
|
REReplace(report, "<[^>]*>", "", "All")
|
Removes all HTML tags from a string value
of the report variable.
|
|
