Macromedia coldfusion 4.5-cfml language reference ユーザーズマニュアル

198

CFML Language Reference

Example

<CFQUERY NAME="GetMessages" DATASOURCE="cfsnippets">
SELECT *
FROM Messages
</CFQUERY>
<HTML>
<HEAD>
<TITLE>
CFSET Example
</TITLE>
</HEAD>

<BODY bgcolor=silver>
<H3>CFSET Example</H3>

<P>CFSET allows you to set and reassign values to local or
global variables within a CF template.

<CFSET NumRecords = GetMessages.RecordCount>
<P>For example, the variable NumRecords has been declared on
this template to hold the amount of records returned from
our query (<CFOUTPUT>#NumRecords#</CFOUTPUT>).

<P>In addition, CFSET can be used to pass variables from other
pages, such as this example which takes the url parameter
Test from this link
(<a href="cfset.cfm?test=<CFOUTPUT>#URLEncodedFormat("
hey, you, get off of my cloud")#</CFOUTPUT>">click here</A>) to display
a message:
<P><CFIF IsDefined ("url.test") is "True">

<H3>The variable url.test has not been passed from
another page.</H3>

</CFIF>

<P>Finally, CFSET can also be used to collect environmental
variables, such as the time, the IP address of the user, or any
other function or expression possible in ColdFusion.

<CFSET the_date =
#DateFormat(Now())# & " " & #TimeFormat(Now())#>
<CFSET user_ip = CGI.REMOTE_ADDR>
<CFSET complex_expr = (23 MOD 12) * 3>
<CFSET str_example = Reverse(Left(GetMessages.body, 35))>
...