(PECL mongo >= 0.8.0)
MongoId::__toString — 返回该 id 十六进制的表示形式
此函数没有参数。
该 id。
Example #1 MongoId::__toString() 例子
<?php
$m = new MongoClient();
$collection = $m->selectDB("foo")->selectCollection("bar");
$collection->insert(array( "x" => "y" ));
$collection->insert(array( "x" => "y" ));
$cursor = $collection->find();
$r1 = $cursor->next();
$r2 = $cursor->next();
echo $r1["_id"] . "\n";
echo $r2["_id"] . "\n";
?>
以上例程的输出类似于：
49a7011a05c677b9a916612a 49a702d5450046d3d515d10d