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