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IsLocalHost
Last update:
May 18, 2026
Description
Determines whether the specified IP address is the localhost. This supports both IPv4 and IPv6 addresses.
Returns
True, if the IP address is the localhost; False, otherwise.
Category
Syntax
IsLocalHost(ipaddress)See also
History
ColdFusion MX 7.01: Added this function.
Parameters
Parameter | Description |
ipaddress | Valid IP address. |
Example
<h3>IsLocalHost Example</h3>
<cfif IsDefined("FORM.theTestIPAddress")>
<cfif IsLocalHost(FORM.theTestIPAddress)>
<h3>The IP address <cfoutput>#FORM.theTestIPAddress)#</cfoutput> is the localhost</h3>
<cfelse>
<h3>The IP address <cfoutput>#DE(FORM.theTestIPAddress)#</cfoutput> is not the localhost.</h3>
</cfif>
</cfif>
<form action = "isIPAddressLocalHost.cfm">
<p>Enter an IP address to find out if it is the localhost.
<p><input type = "Text" name = "TheTestIPAddress" value = "127.0.0.1"
<input type = "Submit" value = "Is this the localhost?" name = "">
</form>
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