(mongodb >=0.2.0)
MongoDB\Driver\Manager::executeCommand — Execute a MongoDB database command
$db
, MongoDB\Driver\Command $command
[, MongoDB\Driver\ReadPreference $readPreference
] )
Executes command on a MongoDB server matching readPreference.
dbThe name of the database on which to execute the command.
commandThe command document.
readPreferenceOptionally, a MongoDB\Driver\ReadPreference to route the command to. If none given, defaults to the Read Preferences set by the MongoDB Connection URI.
Returns MongoDB\Driver\Cursor on success, throws exception (instanceof MongoDB\Driver\Exception) on failure.
Example #1 MongoDB\Driver\Manager::executeCommand() example
<?php
$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017");
$command = new MongoDB\Driver\Command(array("ping" => 1));
try {
$cursor = $manager->executeCommand("admin", $command);
$response = $cursor->toArray()[0];
} catch(MongoDB\Driver\Exception $e) {
echo $e->getMessage(), "\n";
exit;
}
var_dump($response);
?>
以上例程的输出类似于：
array(1) {
["ok"]=>
float(1)
}
Note:
For write commands, MongoDB\Driver\WriteConcern is included in the
commanddocument itself.
Note:
If a secondary
readPreferenceis used, it is the caller's responsibility to ensure that thecommandcan be executed on a secondary. No validation is done by the driver.