(mongodb >=1.2.0)
MongoDB\BSON\Decimal128::__construct — Construct a new Decimal128
注意: MongoDB\BSON\Decimal128 is only compatible with MongoDB 3.4+. Attempting to use the BSON type with an earlier version of MongoDB will result in an error.
value (string)A decimal string.
value is not a valid decimal string.示例 #1 MongoDB\BSON\Decimal128::__construct() example
<?php
var_dump(new MongoDB\BSON\Decimal128(1234.5678));
var_dump(new MongoDB\BSON\Decimal128(NAN));
var_dump(new MongoDB\BSON\Decimal128(INF));
?>以上示例的输出类似于：
object(MongoDB\BSON\Decimal128)#1 (1) {
["dec"]=>
string(9) "1234.5678"
}
object(MongoDB\BSON\Decimal128)#1 (1) {
["dec"]=>
string(3) "NaN"
}
object(MongoDB\BSON\Decimal128)#1 (1) {
["dec"]=>
string(8) "Infinity"
}