php-doc-en/reference/mongodb/mongodb/driver/command.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ --> 

<phpdoc:classref xml:id="class.mongodb-driver-command" xmlns:phpdoc="http://php.net/ns/phpdoc" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">

 <title>The MongoDB\Driver\Command class</title>
 <titleabbrev>MongoDB\Driver\Command</titleabbrev>

 <partintro>

<!-- {{{ MongoDB\Driver\Command intro -->
  <section xml:id="mongodb-driver-command.intro">
   &reftitle.intro;
   <para>
    The <classname>MongoDB\Driver\Command</classname> class is a value object
    that represents a database command.
   </para>
   <para>
    To provide <quote>Command Helpers</quote> the <classname>MongoDB\Driver\Command</classname> object should be composed.
   </para>
  </section>
<!-- }}} -->

  <section xml:id="mongodb-driver-command.synopsis">
   &reftitle.classsynopsis;

<!-- {{{ Synopsis -->
   <classsynopsis>
    <ooclass><classname>MongoDB\Driver\Command</classname></ooclass>

<!-- {{{ Class synopsis -->
    <classsynopsisinfo>
     <modifier>final</modifier>
     <ooclass>
      <classname>MongoDB\Driver\Command</classname>
     </ooclass>
    </classsynopsisinfo>
<!-- }}} -->
    
    <classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
    <xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.mongodb-driver-command')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[not(@role='procedural')])" />
   </classsynopsis>
<!-- }}} -->

  </section>

  <section xml:id="mongodb-driver-command.examples">
   &reftitle.examples;

   <example>
    <title>Composing <classname>MongoDB\Driver\Command</classname> to provide a helper to create collections</title>
    <programlisting role="php">
<![CDATA[
<?php
class CreateCollection {
    protected $cmd = array();

    function __construct($collectionName) {
        $this->cmd["create"] = (string)$collectionName;
    }
    function setCappedCollection($maxBytes, $maxDocuments = false) {
        $this->cmd["capped"] = true;
        $this->cmd["size"]   = (int)$maxBytes;

        if ($maxDocuments) {
            $this->cmd["max"] = (int)$maxDocuments;
        }
    }
    function usePowerOf2Sizes($bool) {
        if ($bool) {
            $this->cmd["flags"] = 1;
        } else {
            $this->cmd["flags"] = 0;
        }
    }
    function setFlags($flags) {
        $this->cmd["flags"] = (int)$flags;
    }
    function getCommand() {
        return new MongoDB\Driver\Command($this->cmd);
    }
    function getCollectionName() {
        return $this->cmd["create"];
    }
}


$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017");

$createCollection = new CreateCollection("cappedCollection");
$createCollection->setCappedCollection(64 * 1024);

try {
    $command = $createCollection->getCommand();
    $cursor = $manager->executeCommand("databaseName", $command);
    $response = $cursor->toArray()[0];
    var_dump($response);

    $collstats = ["collstats" => $createCollection->getCollectionName()];
    $cursor = $manager->executeCommand("databaseName", new MongoDB\Driver\Command($collstats));
    $response = $cursor->toArray()[0];
    var_dump($response);
} catch(MongoDB\Driver\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

?>
]]>
    </programlisting>
   </example>
   &example.outputs;
   <screen>
<![CDATA[
object(MongoDB\Driver\Command)#3 (1) {
  ["command"]=>
  array(3) {
    ["create"]=>
    string(16) "cappedCollection"
    ["capped"]=>
    bool(true)
    ["size"]=>
    int(65536)
  }
}
array(1) {
  ["ok"]=>
  float(1)
}
array(16) {
  ["ns"]=>
  string(29) "databaseName.cappedCollection"
  ["count"]=>
  int(0)
  ["size"]=>
  int(0)
  ["numExtents"]=>
  int(1)
  ["storageSize"]=>
  int(65536)
  ["nindexes"]=>
  int(1)
  ["lastExtentSize"]=>
  float(65536)
  ["paddingFactor"]=>
  float(1)
  ["paddingFactorNote"]=>
  string(101) "paddingFactor is unused and unmaintained in 2.8. It remains hard coded to 1.0 for compatibility only."
  ["userFlags"]=>
  int(0)
  ["capped"]=>
  bool(true)
  ["max"]=>
  int(9223372036854775807)
  ["maxSize"]=>
  int(65536)
  ["totalIndexSize"]=>
  int(8176)
  ["indexSizes"]=>
  object(stdClass)#4 (1) {
    ["_id_"]=>
    int(8176)
  }
  ["ok"]=>
  float(1)
}
]]>
   </screen>
  </section>

 </partintro>

 &reference.mongodb.mongodb.driver.entities.command;

</phpdoc:classref>

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