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ISML Function - isDefined()

Name	isDefined()
Short Description	checks if an ISML expression results in a valid existing value

Introduction
Syntax
Example

Product Version	6.5
Product To Version
Status	New Labels

Introduction

This function checks if an ISML expression results in a valid existing value. Usually, this function checks a variable for its existence (either server or user defined). It can also be used with HTTP header functions to check for the existence of special keys.

Syntax

isDefined( <ISML expression> )

Example

This example shows how isDefined()can check whether a buyer has a basket or not.

<ISIF condition="#isDefined(Basket)#">
  <ISCOMMENT> View Basket Content </ISCOMMENT>
<ISELSE>
  <!-- Basket does not exist --!>
</ISIF>

Reference - ISML Functions

Disclaimer

The information provided in the Knowledge Base may not be applicable to all systems and situations. Intershop Communications will not be liable to any party for any direct or indirect damages resulting from the use of the Customer Support section of the Intershop Corporate Web site, including, without limitation, any lost profits, business interruption, loss of programs or other data on your information handling system.

Table of Contents

Introduction

Syntax

Example