IsDate

Description

Returns 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." See the Usage section for crucial information.

Syntax

IsDate(string)

Parameters

Parameter

Description

string
A string value

Parameter	Description
string	A string value

Usage

IsDate checks only the U.S. date format. For other date support, see LSDateFormat.

Year values 0-29 are interpreted as 21^st century dates. Year values 30-99 are interpreted as 20^th century dates.

Example

<!--- This example shows the use of IsDate --->
<html>
<head>
<title>IsDate Example</title>
</head>
<body bgcolor = silver>
<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" method = "POST">
<P>Enter a string, determine 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>
</body>
</html>