チュートリアル

簡単なコード例をもとに、MongoDB への接続やドキュメントの追加、ドキュメントの問い合わせ、問い合わせ結果の反復処理、そして接続の切断の方法を示します。各ステップの詳細については後に続くチュートリアルを参照ください。


<?php

// 接続
$m = new MongoClient();

// データベースの選択
$db = $m->comedy;

// コレクション (リレーショナルデータベースのテーブルみたいなもの) の選択
$collection = $db->cartoons;

// レコードの追加
$document = array( "title" => "Calvin and Hobbes", "author" => "Bill Watterson" );
$collection->insert($document);

// 構造が異なる別のレコードの追加
$document = array( "title" => "XKCD", "online" => true );
$collection->insert($document);

// コレクション内の全件の検索
$cursor = $collection->find();

// 結果の反復処理
foreach ($cursor as $document) {
    echo $document["title"] . "\n";
}

?>

上の例の出力は以下となります。

Calvin and Hobbes
XKCD

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User Contributed Notes 3 notes

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pgl at yoyo dot org ¶

10 years ago


To use a collection with periods in its name, quote it with braces:

<?php
$m = new MongoClient();

$cursor = $m->test->{'test.test'}->find();

## equivalent to the following:
#$db = $m->test;
#$collection = $db->{'test.test'};
#$cursor = $collection->find();

foreach ($cursor as $doc) {
    print_r($doc);
?>

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Josh Heidenreich ¶

13 years ago


If you are getting "writing more" shown at random places on the screen, it's a MongoDB connector bug in 1.0.5.

Bug report: http://jira.mongodb.org/browse/PHP-91

Update to the latest connector driver and it should go away.

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php at whoah dot net ¶

14 years ago


Make sure array keys consecutive before inserting. As of 1.0.6 driver, the following will end up as an object of key:value pairs, instead of an array, because it's trying to maintain the 0 and 2 keys:

$array = array('a', 'b', 'c');
unset($array[1]);

$document = array(
'embedded' => $array,
);

// assuming local
$mongo = new Mongo();
$mongo->test->test->insert($document);

mongodb result:
{ "_id" : ObjectId(...), "embedded" : { "0" : "a", "2" : "c" } } 

This is bad if you plan on indexing the embedded property as an array because objects and arrays are indexed differently.

Whether the behaviour will change or not, this is logged here: http://jira.mongodb.org/browse/PHP-104

If you know about it, it's not major, just use a sort() before inserting, or use array_* methods to remove elements instead of unset() -- anything that will re-adjust keys.

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