array size problem

[MrRosary]

I have a 3 dimensional array each of the varous dimensions can be of a different size.

Simple question how do I find the size of any given dimension? count($arrayname) only tells me the size of the first dimension.

MrRosary

[blockage]

To find the second dimension:

count($arrayname[x])

To find the third dimension:

count($arrayname[x][y])

where x is the index of the second dimension, this can be either an integer or a string.

where y is the index of the third dimension, this can also be either an integer or a string.

[MrRosary]

this works fine if you know what the indexes are.

I am pulling large ammounts of data from a db to create associative arrays and have no clear idea what the indexes for each dimension of the array contain.

MrRosary

[Weedpacket]

If you don't know the keys being used in the array, how do you figure out which one you want the size of? Here's something that will tell you the echo out the sizes of all three dimensions.

count($arrayname); // First dimension

foreach($arrayname as $key=>$val)
{ count($val); // is the length of $arrayname[$key]
}

foreach($arrayname as $key=>$val)
{ foreach($val as $k2=>$v2)
  { count($v2); // is the length of $arrayename[$key][$k2]
  }
}

Needless to say, that code won't do anything interesting, but you should be able to get the idea.

[blockage]

This recursive function returns an single associative array containing all the lengths in a multidimensional array. The keys identify the dimensions.

function &multi_count($array, $lengths = array(), $dimension = 0)
{
    if (!is_array($array)) return FALSE;
    if (!isset($lengths[$dimension])) $lengths[$dimension] = 0;
    $lengths[$dimension] += count($array);
    foreach ($array as $child){
        if (is_array($child)){
            $lengths = & multi_count($child, $lengths, $dimension+1);
        }
    }
    return $lengths;
}

// I ran this function with a 6 dimensional array with, like so...

multi_d_array = Array
(
    [input_type] => Array
        (
            [name] => text
            [description] => textarea
            [projects] => checkbox
            [expertise] => checkbox
        )

[create_mode] => Array
    (
        [projects] => dynamic
        [expertise] => dynamic
    )

[0] => Array
    (
        [label] => Clients
        [item] => Client
        [naturaltable] => clients
        [homewardref] => cntID
        [fieldsets] => Array
            (
                [client_details] => Array
                    (
                        [label] => Client details
                        [fields] => Array
                            (
                                [name] => Array
                                    (
                                        [label] => Name
                                    )

                                [description] => Array
                                    (
                                        [label] => Description
                                    )

                            )

                    )

                [work_details] => Array
                    (
                        [label] => Work details
                        [fields] => Array
                            (
                                [projects] => Array
                                    (
                                        [label] => Projects
                                        [xsourcetable] => projects
                                    )

                                [expertise] => Array
                                    (
                                        [label] => Areas of expertise
                                        [xsourcetable] => expertise
                                        [lookuptable] => cnt_xpt
                                        [outwardref] => xptID
                                    )

                            )

                    )

            )

    )

)

print "<pre>dimension counts: ";
print_r($multi_count($multi_d_array));
print "</pre>";

// And got the following output...

dimension counts: Array
(
    [0] => 3
    [1] => 11
    [2] => 2
    [3] => 4
    [4] => 4
    [5] => 8
)

[MrRosary]

Rather you than me if you want to work with 6 dimensional arrays 🙂

I dont actually need to count the different axes of the array for the code to work as foreach does the job. But my boss insists on some sort of status report on the screen to prove the page did something and this will enable me to say X,Y and Z got done.

MrRosary