IsDate

Description

Determines whether a string or Java object can be converted to a date/time value.

Return value

True, if string can be converted to a date/time value; otherwise, False. ColdFusion converts the Boolean return value to its string equivalent, "Yes" or "No."

Syntax

IsDate(string)

Parameters

Parameter Description

string
A string or a variable that contains one.

Parameter	Description
string	A string or a variable that contains one.

Usage

This function checks only a U.S. date format. For other date support, see LSDateFormat.

A date/time object falls in the range 100 AD-9999 AD. See "How ColdFusion processes two-digit year values".

Example

<h3>IsDate Example</h3>
<cfif IsDefined("FORM.theTestValue")>
  <cfif IsDate(FORM.theTestValue)>
  <h3>The string <cfoutput>#DE(FORM.theTestValue)#</cfoutput> 
   is a valid date</h3>
  <cfelse>
  <h3>The string <cfoutput>#DE(FORM.theTestValue)#</cfoutput> 
   is not a valid date</h3>
  </cfif>
</cfif>
<form action = "isDate.cfm">
<p>Enter a string, find whether it can be evaluated to a date value.
<p><input type = "Text" name = "TheTestValue" value = "<cfoutput>#Now()#
</cfoutput>">
<input type = "Submit" value = "Is it a Date?" name = "">
</form>