array of array

[Bob Bedford]

I've to save in an array of array some values.

Problem: I don't know the size of the array before filling it.

I'd like something like

$bigarray = array():

then runnig the code I must create dinamically (I don't know how many) few
arrays in the bigarray;
$bigarray["X"] = array():
$bigarray["Y"] = array():

then fill those arrays with few unknow number of values.
array_push($bigarray["X"],$value1);
array_push($bigarray["X"],$value2);

array_push($bigarray["Y"],$value5);
....
but array_push doesn't manage it.

How to do so ?

Bob

[Kim André Akerø]

Bob Bedford wrote:

I've to save in an array of array some values.

Problem: I don't know the size of the array before filling it.

I'd like something like

$bigarray = array():

then runnig the code I must create dinamically (I don't know how
many) few arrays in the bigarray; $bigarray["X"] = array():
$bigarray["Y"] = array():

then fill those arrays with few unknow number of values.
array_push($bigarray["X"],$value1);
array_push($bigarray["X"],$value2);

array_push($bigarray["Y"],$value5);
...
but array_push doesn't manage it.

How to do so ?

$bigarray["X"][] = $value1;
$bigarray["X"][] = $value2;
....
$bigarray["Y"][] = $value5;

--
Kim André Akerø
- ki******@NOSPAMbetadome.com
(remove NOSPAM to contact me directly)

[Ewoud Dronkert]

Bob Bedford wrote:

array_push($bigarray["Y"],$value5);
but array_push doesn't manage it.

Try $big_array['Y'][] = $value5;
In the manual it says "has the same effect" but maybe the implementation
is different? I don't know. It also says:

"Note: If you use array_push() to add one element to the array it's better
to use $array[] = because in that way there is no overhead of calling a
function."

--
E. Dronkert

[Bob Bedford]

> $bigarray["X"][] = $value1;

$bigarray["X"][] = $value2;
...
$bigarray["Y"][] = $value5;

Does it create a new element in the $bigarray["X"] ?
I mean then I have
$bigarray["X"][0] == $value1;
$bigarray["X"][1] == $value2;

Bob

[Kim André Akerø]

Bob Bedford wrote:

$bigarray["X"][] = $value1;
$bigarray["X"][] = $value2;
...
$bigarray["Y"][] = $value5;

Does it create a new element in the $bigarray["X"] ?
I mean then I have $bigarray["X"][0] == $value1;
$bigarray["X"][1] == $value2;

Yes. As mentioned in Ewoud Dronkert's reply, this is a better way of
doing it rather than using array_push(). Even the PHP manual mentions
this.

$bigarray[] = $value1;
=>
$bigarray[0] == $value1;

$bigarray[0][] = $value2;
=>
$bigarray[0][0] == $value2;

--
Kim André Akerø
- ki******@NOSPAMbetadome.com
(remove NOSPAM to contact me directly)