CFLib.org – Common Function Library Project

Description:
Takes a url of an image as an argument. Returns boolean value based on whether or not the remote image is a valid jpeg or gif.

Return Values:
Returns a boolean.

Example:

<cfset imgURL = "http://cflib.org/images/logo_top.gif">

<cfif isImage(imgURL)>
    <img src="#imgURL#">
<cfelse>
    NO IMAGE
</cfif>

Parameters:

Full UDF Source:

<!---
 Checks to see if an image URL contains a valid jpeg or gif.
 
 @param imgURL      URL. (Required)
 @return Returns a boolean. 
 @author Nick Maloney (nmaloney@prolucid.com) 
 @version 1, September 7, 2005 
--->
<cffunction name="isImage" returntype="boolean" output="false">
    <cfargument name="imgURL" type="string" required="true">
    <cftry>
        <cfhttp method="get" url="#arguments.imgURL#" />
        <cfif cfhttp.mimetype eq "image/jpeg" or cfhttp.mimetype eq "image/gif">
            <cfreturn true>
        <cfelse>
            <cfreturn false>
        </cfif>
    <cfcatch>
        <cfreturn false>
    </cfcatch>
    </cftry>
</cffunction>