Paul van Haren wrote: > I'm trying to use arrays to implement a sort of data tree. For the code to > work, it is essential that the nodes can be edited after they have become > part of the tree. That would require that the array elements are pushed > "by reference" rather than "by value". > > <?php > > $arr1 = array (); > $arr2 = array (); > > array_push ($arr1, 1); > array_push ($arr1, $arr2); // <-- the important line $arr1[] =& $arr2; > array_push ($arr1, 2); > array_push ($arr2, 3); > array_push ($arr2, 4); > > // Contents of $arr2 are now empty > // apparently $arr2 is inserted by value > print_r ($arr1); > > echo "Expected output:\n"; > $arr1[1] = $arr2; > print_r ($arr1); > ?> > > What is the most obvious way to implement a tree-like structure in PHP? Is > there a way to push arrays by reference rather than by value? > > BTW: I'm using PHP CLI version 5.2 > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
