PHP数组值为变量

Question

I'm using the following piece of code to count the number of locations from a table:

$result = mysqli_query($conn,"SELECT location FROM table ORDER BY location");

$aloc_list = array();
while ($row = mysqli_fetch_array($result))
        {$aloc_list[] = $row['location'];
        }

print_r(array_count_values($aloc_list));

Which gives me the following array:

Array
(
    [CANADA] => 106
    [USA] => 547
    [MEXICO] => 93
    [GREAT_BRITAIN] => 111
    [EASTERN_EUROPE] => 227
    [RUSSIA] => 405
    [CHINA] => 341
    [INDIA] => 253
)

I have tried to 'extract' the array values and put them in a variable but nothing seems to work:

$canada = $aloc_list[0];
$canada = $aloc_list['CANADA'];
$canada = $aloc_list[0]['CANADA'];
$canada = $aloc_list[0];

I want to end up with a variable called $canada equal to 106, a variable called $usa equal to 547, etc.

How do I accomplish this?

Answer 1

You are trying to select the mentioned values from the original $aloc_list array - but they don't directly exist in there. They're the result of the call to array_count_values($aloc_list) - this produces a new array, and you need to read from that instead.

For example:

$counts = array_count_values($aloc_list);
$canada = $counts['CANADA'];
echo $canada;