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>