Description
Decodes a URL-encoded string.
Returns
A copy of a string, decoded.
Category
Conversion functions, Other functions, String functions
URLDecode(urlEncodedString[, charset])
See also
URLEncodedFormat; Tags and functions for globalizing applications in the Developing ColdFusion Applications
History
ColdFusion MX 6.1: Changed the default charset: the default charset is the character encoding of the URL scope.
ColdFusion MX:
- Changed Unicode support: ColdFusion supports the Java UCS-2 representation of Unicode character values 0-65535. (Earlier releases supported ASCII values.)
- Added the charset parameter.
Parameters
Parameter |
Description |
|---|---|
urlEncodedString |
URL-encoded string or a variable that contains one. |
charset |
The character encoding in which the URL is encoded. Optional.The following list includes commonly used values:
|
Usage
URL encoding formats some characters with a percent sign and the two-character hexadecimal representation of the character. For example, a character whose code is 129 is encoded as %81. A space is encoded with a plus sign. Query strings in HTTP are always URL-encoded.
Example
This example creates, encodes, and decodes a string that contains ASCII character codes:
<cfscript>
// Build string
s = "";
for (c = 1; c lte 256; c = c + 1)
{
s = s & chr(c);
}
// Encode string and display result
enc = URLEncodedFormat(s);
WriteOutput("Encoded string is: '#enc#'.<br>");
// Decode and compare result with original
dec = URLDecode(enc);
if (dec neq s)
{
WriteOutput("Decoded is not the same as encoded.");
}
else
{
WriteOutput("All's quiet on the Western front.");
}
</cfscript>
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