How can I use php to split an array into two new arrays based on conditions and save the newly created array as an English key? (Examples already exist in the question)

{Code ...} question 1: divide the first index into a $ int array of 0, 1, and 2, and divide the English keys a, B, and c into a $ string array. I don't know how to deal with the distinction between 0, 1, 2 and English keys, because they are all string types? (Resolved) Question 2: {code...} after var_dump...

$array = array('0'=>'3','1','2','a'=>'a','b'=>'b','c'=>'c')

Question 1:
Divide the first index into a $ int array of 0, 1, 2, and the English keys a, B, and c into a $ string array.
I don't know how to deal with the distinction between 0, 1, 2 and English keys, because they are all string types? (Resolved)

Question 2:

First array: array (size = 3) 0 => string '3' (length = 1) 1 => string '1' (length = 1) 2 => string '2' (length = 1) second array: array (size = 3) 0 => array (size = 1) 'A' => string 'A' (length = 1) 1 => array (size = 1) 'B' => string 'B' (length = 1) 2 => array (size = 1) 'C' => string 'C' (length = 1)

After var_dump, I used array_push in the second array, but I want the index to be indexed in English instead of numbers,
As follows:

array (size=3)  'a' => string '3' (length=1)  'b' => string '1' (length=1)  'c' => string '2' (length=1)

Reply content:

$array = array('0'=>'3','1','2','a'=>'a','b'=>'b','c'=>'c')

Question 1:
Divide the first index into a $ int array of 0, 1, 2, and the English keys a, B, and c into a $ string array.
I don't know how to deal with the distinction between 0, 1, 2 and English keys, because they are all string types? (Resolved)

Question 2:

First array: array (size = 3) 0 => string '3' (length = 1) 1 => string '1' (length = 1) 2 => string '2' (length = 1) second array: array (size = 3) 0 => array (size = 1) 'A' => string 'A' (length = 1) 1 => array (size = 1) 'B' => string 'B' (length = 1) 2 => array (size = 1) 'C' => string 'C' (length = 1)

After var_dump, I used array_push in the second array, but I want the index to be indexed in English instead of numbers,
As follows:

array (size=3)  'a' => string '3' (length=1)  'b' => string '1' (length=1)  'c' => string '2' (length=1)

is_numeric()

$arr1 = $arr2 = [];$arr = array('0'=>'3','1','2','a'=>'a','b'=>'b','c'=>'c');foreach ($arr as $key=>$value) {    if (is_numeric($key)) {        $arr1[$key] = $value;    } else {        $arr2[$key] = $value;    }}

$aaa = array(1=>'aa','2'=>'gg','cc'=>'dd');        foreach ($aaa as $key => $value) {            if (is_numeric($key)) {                echo "1".'
';            }elseif (is_string($key)) {                echo "string";            }        }        die();

Run the code-breaking test on the previous section to test whether '1' or 'ccsdad' is 'ccsdad', which is '1' or '1'. then you can judge the two new arrays in the group.

This is the result

11string