(mongodb >=1.5.0)
MongoDB\BSON\Int64::__toString — Returns the string representation of this Int64
此函数没有参数。
Returns the string representation of this Int64.
Example #1 MongoDB\BSON\Int64::__toString() example
<?php
$int64 = unserialize('C:18:"MongoDB\BSON\Int64":47:{a:1:{s:7:"integer";s:19:"9223372036854775807";}}');
var_dump((string) $int64);
?>
以上例程的输出类似于：
string(19) "9223372036854775807"