Core Function IsIndexSet

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IndexSet( <array>, <index> )

Contents

Description

Check if an element exist at a given index ID within an array.

Parameters

array

The array to use.

index

The index to check (starts at 0).

Return Value

Success - Returns 1.

Failure - Returns 0.

Remarks

This cannot be used to check if a hash (dictionary) key exists for that use IsKeySet() instead.

Example

$a = array("One", "Two");
 
println( "Index 0 is : " . (IsIndexSet($a, 0) ? "SET" : "NOT SET") );
println( "Index 1 is : " . (IsIndexSet($a, 1) ? "SET" : "NOT SET") );
println( "Index 2 is : " . (IsIndexSet($a, 2) ? "SET" : "NOT SET") );
 
// Delete an index and do it again
unset($a[1]);
println( "Index 0 is : " . (IsIndexSet($a, 0) ? "SET" : "NOT SET") );
println( "Index 1 is : " . (IsIndexSet($a, 1) ? "SET" : "NOT SET") );
println( "Index 2 is : " . (IsIndexSet($a, 2) ? "SET" : "NOT SET") );
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