gistfile1.php

<?php

$notavector =['one','two','three'];

print_r($notavector);

unset($notavector[1]);

//missing a key!
print_r($notavector);

//so now this will blow up
for ($i=0;$i<count($notavector);$i++){
	print($notavector[$i]."\r\n");
}

/*
and now the output:

Array
(
    [0] => one
    [1] => two
    [2] => three
)
Array
(
    [0] => one
    [2] => three
)
one
PHP Notice:  Undefined offset: 1 in /private/tmp/proc.php on line 14

Notice: Undefined offset: 1 in /private/tmp/proc.php on line 14


*/