Question

Is it possible to take an array of values, for example:

$index = array('0' => '1', '1' => '4', '2' => '7');

And use this to update the position of another array at position $update['1']['4']['7']?

I thought maybe I could do something like the below (but it seems that I can’t)…

for($build_key=0;$build_key<3; $build_key++){
    $this_key .= "[".$index[$build_key]."]";
}
$update.$this_key = 'new data in';

Update

I’m not sure how many levels the array will have, which is why I’ve tried to use a for loop (i’ve put ‘3’ above in the for loop though maybe i should have used count($index) instead.

Answer 1

Like this?

$x = $index[0];
$y = $index[1];
$z = $index[2];

$update[$x][$y][$z] = 'new data in';

This will work for any length array:

$index = array('0' => '1', '1' => '4', '2' => '7');
$where = &$update;

foreach ($index as $key => $value)
    $where = &$where[$value];      

$where = 'new data in';