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IsImageFile
Last update:
May 18, 2026
Description
Verifies whether an image file is valid.
Returns
True, if the value is a valid image file; False, otherwise.
Category
Syntax
IsImageFile(path)See also
History
ColdFusion 8: Added this function.
Parameters
| Parameter | Description |
path | Required. The pathname of the on-disk or in-memory file, or URL, to be checked. The pathname can be absolute or relative to the CFM page and must be enclosed in quotation marks. |
Usage
Use this function to determine whether an image file is valid. This function returns a False value if the image file format is not supported by the server where ColdFusion is deployed, or if the pathname to the image file is null or invalid.For a list of standard image file formats supported by ColdFusion, see the supported image file formats provided in cfimage . To determine which image file formats are supported on the server where ColdFusion is deployed, use the GetReadableImageFormats and GetWriteableImageFormats .
Example
<!--- Use the IsImageFile function to determine whether an image retrieved from the artwork table in the cfartgallery database is a valid image file. --->
<cfif IsImageFile("images/#artwork.largeImage#")>
<cfset myImage=ImageNew("images/#artwork.largeImage#")>
<cfset ImageResize(myImage,50,"")>
<cfimage action="writeToBrowser" source="#myImage#">
<cfelse>
<p>I'm sorry, there is no image associated with the title you selected. Please click the Back button and try again.</p>
</p>
</cfif>
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