PHP操作MongoDB时的整数问题及对策_PHP教程


ini_set(mongo.native_long, 1);

$instance = new Mongo();

$instance = $instance->selectCollection(test, test);

for ($i = 0; $i < 10; $i++) {
$instance->insert(array(
group_id => rand(1, 5),
count => rand(1, 5),
));
}

?>


ini_set(mongo.native_long, 1);

$instance = new Mongo();

$instance = $instance->selectCollection(test, test);

$keys = array(group_id => 1);

$initial = array(count => 0);

$reduce =
function(obj, prev) {
prev.count += obj.count;
}
;

$result = $instance->group($keys, $initial, $reduce);

var_dump($result);

?>

ini_set(mongo.native_long, 0);

$initial = array(count => (float)0);


ini_set(mongo.native_long, 1);

$instance = new Mongo();

$instance = $instance->selectDB(test);

$map =
function() {
emit(this.group_id, this.count);
}
;

$reduce =
function(key, values) {
var sum = 0;

for (var index in values) {
sum += values[index];
}

return sum;
}
;

$result = $instance->command(array(
mapreduce => test,
map => $map,
reduce => $reduce
));

$result = iterator_to_array($instance->{$result[result]}->find());

var_dump($result);

?>