You can find the CFFiddle demo of this function and other file functions as part of a project that is shared with you.

Click the button below to launch CFFiddle.

To copy the project in your workspace in CFFiddle, follow the steps below:

  1. Log in with your Gmail or Facebook credentials.
  2. Navigate to the project in the left pane.
  3. Once you make some changes in any cfm in the project, a pop up displays asking you to save the project.
  4. Give the project a suitable name and click Save.
  5. Create a folder named dir1 and upload a text file, myfile.txt.


If you specify a file path, writes the entire content to the specified on-disk or in-memory file. If you specify a file object, writes text or binary data to the file object.


System functions

Function syntax

FileWrite(filepath, data [, charset])


FileWrite(fileobj, data)

See also



ColdFusion 8: Added this function.





The character encoding in which the file contents is encoded. The following list includes commonly used values:

  • utf-8
  • iso-8859-1
  • windows-1252
  • us-ascii
  • shift_jis
  • {{iso-2022-jp }}
  • euc-jp
  • euc-kr
  • big5
  • euc-cn
  • utf-16
    If the file starts with a byte order mark and you set this attribute to a conflicting character encoding, ColdFusion generates an error.


Content of the file or file object to create.


Name of the file object to write.


Pathname of the on-disk or in-memory file to write. If not an absolute path (starting with a drive letter and a colon, or a forward or backward slash), it is relative to the ColdFusion temporary directory, which is returned by the getTempDirectory function.


Use the following syntax to specify an in-memory file, which is not written to disk. In-memory files speed processing of transient data.


The filepath can include directories, for example ram:///petStore/images/poodle.jpg. Create the directories in the path before you specify the file. For more information on using in-memory files, see Working with in-memory files in the Developing ColdFusion Applications.


<h3>FileWrite Example</h3>
<!--- This example gets the email addresses of employees, --->
<!--- creates a file object that contains the e-mail addresses, --->
<!--- read the file object, and then creates a text file with a --->
<!--- list of e-mail addresses. --->

<cfquery name="getemployees" datasource="cfdocexamples">
FROM Employees

<cfset companymail = "">

<cfloop query = "getemployees">
<cfset companymail = companymail & #EMAIL# & ";" & " ">

FileWrite("mail_list", "#companymail#");
mlist = FileRead("mail_list");
FileWrite("c:\temp\mail_list.txt", "#mlist#");


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