PHP array key value small example

$switching = array(
 10, // key = 0
 5 => 6,
 3 => 7,
 'a' => 4,
 11, / / key = 6 (the maximum value of the integer key index in the entire array is 5)
 '8' => 2, // key = 8 (the string key '8' is converted to 8)
 '02' => 77, // key = '02' (note not 2)
 0 => 12
 /*The previous key with a value of 10 is assigned 0, and later the value of the 0 key is redefined to 12,
 thus overwriting the previous one Default 0 key value */
 );
// empty array
$empty = array();
?>

If printed with print_r($switching), the result is: Array ( [0] => 12 [5] => 6 [3] => 7 [a] => 4 [6] => 11 [8] => 2 [02] => 77 ) Note that the two-digit number 02 is sorted behind.