Re: Array references - how to unset() ?

Martin Zvarík wrote:

Robert Cummings napsal(a):

Martin Zvarík wrote:

$ARR = array( 'a' => array('b' => 'blah') ); function set($key) {

    global $ARR;

    foreach ($key as $i => $k) {
         if ($i == 0) {
                $sourcevar =& $ARR[$k];
            } else {
                $sourcevar =& $sourcevar[$k];
            }
        }

     // unset($sourcevar); // will cancel the reference - we want to unset the ['b'], but how?

$sourcevar = null; // will set it NULL, but won't unset... foreach ($ARR ... // I could run a cleanup, that would go through all of the array and unset what is NULL, but I would need to use REFERENCES again!! array_walk_recursive() is also worthless... any ideas? } set( array('a', 'b') );

unset( $ARR[$k] ) Cheers, Rob.

Thanks for reply, but I want to: unset($ARR['a']['b']) Imagine I have this: $KEYS = array('a', 'b', 'c'); And I want to: unset($ARR['a']['b']['c'])

This is possible. You're just not giving enough consideration to your exit strategy :) <?php function unset_deep( &$array, $keys ) {

    $final = array_pop( $keys );

    foreach( $keys as $key )
    {
        $array = &$array[$key];
    }

    unset( $array[$final] );

} $value = array (

    'a' => array
    (
        'b' => array
        (
            'c' => 'C',
            'd' => 'D',
            'e' => 'E'
        ),
    ),

); $keys = array('a', 'b', 'c'); unset_deep( $value, $keys ); print_r( $value ); ?> Cheers, Rob. -- http://www.interjinn.com Application and Templating Framework for PHP