note 35214 added to function.implode

*** MULTI-DIMENSIONAL ARRAY IMPLODE *** First of all, it should be noted that the function in the previous note is not technically correct, as it glues the outside of the first piece. This is the problem faced by any function that wants to construct a set out of an array without the overhead of handling the boundary indexes. It also doesn't preserve the dimensional architecture. Use this function when you want to call implode() on a multi-dimensional array and want the resulting string to preserve the architecture of the different dimensions. For example: array ( 5, array (2, 4, 6), array (3, 6, 9, array (12))) would be reduced to: [ 5, [ 2, 4, 6 ], [ 3, 6, 9, [ 12 ] ] ] Note that this does not preserve key values. If you need those, you are probably better off using serialize() and then replacing the tokens with your own symbols using the string functions. Anyway, here is the code: function mdImpode($x, $y) { $a = (is_array($x)) ? '[ ' . array_reduce($x, 'mdImplode') . ' ]' : $x; $b = (is_array($y)) ? '[ ' . array_reduce($y, 'mdImplode') . ' ]' : $y; return $a . ', ' . $b; } Then to call it, use: $result = '[ ' . array_reduce($pieces, 'mdImplode') . ' ]'; Note that you have to make manual changes if you want different glue or set symbols. There may be a more elegant solution, but this should be a good compromise between efficiency and simplicity (the manual says that array_reduce is iterative, so this should be pretty speedy). ---- Manual Page -- http://www.php.net/manual/en/function.implode.php Edit Note -- http://master.php.net/manage/user-notes.php?action=edit+35214 Delete Note -- http://master.php.net/manage/user-notes.php?action=delete+35214&report=yes Reject Note -- http://master.php.net/manage/user-notes.php?action=reject+35214&report=yes