Core Function IsKeySet
From Sputnik Wiki
IsKeySet( <array>, <key> )
Contents |
Description
Check if given key exists within an array (hash/dictionary).
Parameters
array
The array to use.
key
The Key to check.
Return Value
Success - Returns 1.
Failure - Returns 0.
Remarks
Alias' for this command
IsIndexSet()
Example
$a = array("One" => "FoX", "Two" => "Cat", "Three" => "Dog"); println( "Key[One] is : " . (IsKeySet($a, "One") ? "SET" : "NOT SET") ); println( "Key[Two] is : " . (IsKeySet($a, "Two") ? "SET" : "NOT SET") ); println( "Key[Three] is : " . (IsKeySet($a, "Three") ? "SET" : "NOT SET") ); println( "Key[Four] is : " . (IsKeySet($a, "Four") ? "SET" : "NOT SET") ); // Delete a key and do it again unset($a["Two"]); println( "Key[One] is : " . (IsKeySet($a, "One") ? "SET" : "NOT SET") ); println( "Key[Two] is : " . (IsKeySet($a, "Two") ? "SET" : "NOT SET") ); println( "Key[Three] is : " . (IsKeySet($a, "Three") ? "SET" : "NOT SET") ); println( "Key[Four] is : " . (IsKeySet($a, "Four") ? "SET" : "NOT SET") );
Alternative way using IsSet()
IsSet($a) # Check if $a is set IsSet($a['Test']) # Check if $a (as array) index 'Test' is set IsSet($a['Test']['Cat']) # Check if $a (as array) index 'Test' (as array) index 'Cat' is set
