Split multidimensional array in its sub_arrays

问题

I have just had this issue. I have a multidimensional array ($varianti) that looks like this:

Array
(
    [pa_taglia] => Array
        (
            [0] => l
            [1] => m
        )

    [pa_colore] => Array
        (
            [0] => blu
            [1] => giallo
            [2] => rosso
        )

)

What I need is to get different arrays for each sub array so I need this result:

Array
(
    [0] => l
    [1] => m
)
Array
(
    [0] => blu
    [1] => giallo
    [2] => rosso
)

The main problem is that I can get as many sub-arrays as needed (this is for my Woocommerce plugin to create product_variations from attributes) so it needs to be flexible.

This is the code I came up with (after 2 hours...):

$keys = array_keys($varianti);//get the main keys

        //split multidimensional array in sub arrays
        foreach ($keys as $key=>$val){          
            $nr_var[$val]= count($varianti[$keys[$key]]);//create array such as array('key1'=> qty1, 'key2'=> qty2);
            $$val = $varianti[$keys[$key]];//create a variable variable from key
        }
        print_r($nr_var);
        foreach ($nr_var as $chiave=>$valore){
            print_r($$chiave);//retrieve values calling variable variable
        }

I hope this may be of help to anyone.

回答1:

You can use extract function which will automatically create new variables basing on the key values:

extract($varianti);
var_dump($pa_colore);

回答2:

you can use extract() function of PHP. this function extract array in variable format.

Consider this is in $main_array

Array
(
    [pa_taglia] => Array
        (
            [0] => l
            [1] => m
        )

    [pa_colore] => Array
        (
            [0] => blu
            [1] => giallo
            [2] => rosso
        )

)

extract($main_array);

print_r($pa_taglia);
print_r($pa_colore);

For more detail refer http://php.net/manual/en/function.extract.php

回答3:

You can just get them by key and store them in a variable.

$array1 = $varianti["pa_taglia"];
$array2 = $varianti["pa_colore"];

var_dump($array1);
var_dump($array2);

回答4:

Here I have got the all global variable using get_defined_vars(); of your program ,which you obviously be multidimensional array. After that i am access their key with array_keys($orignalArr);. Then finally display every subarray by their key value.

$orignalArr = get_defined_vars();
$keyArr=array_keys($orignalArr);
$arrCount=sizeof($keyArr);
echo  "Values of keys<br><br>";
for($i=0;$i<$arrCount;$i++)
{
echo "<br/>";
print_r($keyArr[$i]);
echo "==";
print_r($orignalArr[$keyArr[$i]]);
echo "<br/>";
}

来源：https://stackoverflow.com/questions/38740656/split-multidimensional-array-in-its-sub-arrays

标签

php

multidimensional-array

split

woocommerce

sub-array