Question

http://codepad.org/GAl6W6xn

Why does this code say “not set”? What is array location 2 set as to make it say “set”? How can I approach this so I know if there is or isn’t a value in location 2?

(sorry for lack of a good title, couldn’t think of one)

Answer 1

Answer is

array_key_exists
empty

Try this

array_key_exists(2, $r);
// or
!empty($r[2]);

For more accurate

$line = "a";
$r = explode("|",$line);

print_r($r);
if(!empty($r[2])) // or use if(array_key_exists(2, $r))
    echo "array location [2] set";
else echo "array location [2] NOT set";