I found a magic array!

[DuneMessiah]

<?php

$my_array = array();

$my_array[] = 'One';
$my_array[] = 'Two';
$my_array[] = 'Three';
$my_array[] = 'Four';
$my_array[] = 'Five';
$my_array[] = 'Six';

for ($i = 1, $j = count($my_array); $i < $j; $i++) {
    echo 'Count = ' . count($my_array) . '<br>';

    echo 'Unsetting: ' . $i . '<br>';

    unset($my_array[$i]);
}

?>

Question:

How does this code unset array index 5 when there is only 2 elements in the array?

😕

[grieg]

as it seems to me the PHP indexes array and it becomes like this :
$my_array[0] = 'One';
$my_array[1] = 'Two';
$my_array[2] = 'Three';
$my_array[3] = 'Four';
$my_array[4] = 'Five';
$my_array[5] = 'Six';
and when the unset statement deletes specified elemnet from array , for exmaple

unset($my_array[3]) 

, the

$my_array[4] = four

will be still

$my_array[4] = four

, not

$my_array[3] = four

even when there will be only three elements in array
PS. i'm not really sure about this but it seems the only right way to me

[DuneMessiah]

I know, I know... 😉

That's how to make it "right".

<?php

$my_array = array();

$my_array[] = 'One';
$my_array[] = 'Two';
$my_array[] = 'Three';
$my_array[] = 'Four';
$my_array[] = 'Five';
$my_array[] = 'Six';

unset($my_array[2]);

unset($my_array[4]);

unset($my_array[5]);

echo 'Bad karma:<br>';

for ($i = 0, $j = count($my_array); $i < $j; $i++) {
    echo $i . ':' . $my_array[$i] . '<br>';
}

$my_array = array_values($my_array);

echo 'Good karma:<br>';

for ($i = 0, $j = count($my_array); $i < $j; $i++) {
    echo $i . ':' . $my_array[$i] . '<br>';
}

?>