IsDate

Returns TRUE if string can be converted to a date/time value; otherwise, FALSE. Note that ColdFusion converts the Boolean return value to its string equivalent, "Yes" and "No."

See also ParseDateTime, CreateDateTime, and IsNumericDate.

Syntax

IsDate(string)

string

Any string value.

Usage

Years from 0 to 29 are interpreted as 21^st century values. Years 30 to 99 are interpreted as 20^th century values.

Examples

<!--- 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, and discover if
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>

CFML Language Reference
Chapter 2 : ColdFusion Functions