Mongodb 简明教程

MongoDB - PHP

要将 MongoDB 与 PHP 一起使用，您需要使用 MongoDB PHP 驱动程序。从 url Download PHP Driver 下载该驱动程序。务必下载其最新版本。现在解压存档并将 php_mongo.dll 放在你的 PHP 扩展目录（默认情况下为 “ext”）中，并在你的 php.ini 文件中添加以下行：

extension = php_mongo.dll

Make a Connection and Select a Database

为了连接，您需要指定数据库名称，如果数据库不存在，则 MongoDB 会自动创建它。

以下是连接数据库的代码片段：

<?php
   // connect to mongodb
   $m = new MongoClient();

   echo "Connection to database successfully";
   // select a database
   $db = $m->mydb;

   echo "Database mydb selected";
?>

程序执行后，将产生以下结果：

Connection to database successfully
Database mydb selected

Create a Collection

以下是创建集合的代码片段 −

<?php
   // connect to mongodb
   $m = new MongoClient();
   echo "Connection to database successfully";

   // select a database
   $db = $m->mydb;
   echo "Database mydb selected";
   $collection = $db->createCollection("mycol");
   echo "Collection created succsessfully";
?>

程序执行后，将产生以下结果：

Connection to database successfully
Database mydb selected
Collection created succsessfully

Insert a Document

要将文档插入到 MongoDB 中，使用 insert() 方法。

以下是插入文档的代码片段：

<?php
   // connect to mongodb
   $m = new MongoClient();
   echo "Connection to database successfully";

   // select a database
   $db = $m->mydb;
   echo "Database mydb selected";
   $collection = $db->mycol;
   echo "Collection selected succsessfully";

   $document = array(
      "title" => "MongoDB",
      "description" => "database",
      "likes" => 100,
      "url" => "http://www.tutorialspoint.com/mongodb/",
      "by" => "tutorials point"
   );

   $collection->insert($document);
   echo "Document inserted successfully";
?>

程序执行后，将产生以下结果：

Connection to database successfully
Database mydb selected
Collection selected succsessfully
Document inserted successfully

Find All Documents

要从集合中选择所有文档，使用 find() 方法。

以下是选择所有文档的代码片段：

<?php
   // connect to mongodb
   $m = new MongoClient();
   echo "Connection to database successfully";

   // select a database
   $db = $m->mydb;
   echo "Database mydb selected";
   $collection = $db->mycol;
   echo "Collection selected succsessfully";
   $cursor = $collection->find();
   // iterate cursor to display title of documents

   foreach ($cursor as $document) {
      echo $document["title"] . "\n";
   }
?>

程序执行后，将产生以下结果：

Connection to database successfully
Database mydb selected
Collection selected succsessfully {
   "title": "MongoDB"
}

Update a Document

要更新文档，需要使用 update() 方法。

在以下示例中，我们将会把已插入文档的标题更新为 MongoDB Tutorial 。以下是更新文档的代码片段：

<?php
   // connect to mongodb
   $m = new MongoClient();
   echo "Connection to database successfully";

   // select a database
   $db = $m->mydb;
   echo "Database mydb selected";
   $collection = $db->mycol;
   echo "Collection selected succsessfully";
   // now update the document
   $collection->update(array("title"=>"MongoDB"),
      array('$set'=>array("title"=>"MongoDB Tutorial")));
   echo "Document updated successfully";

   // now display the updated document
   $cursor = $collection->find();

   // iterate cursor to display title of documents
   echo "Updated document";

   foreach ($cursor as $document) {
      echo $document["title"] . "\n";
   }
?>

程序执行后，将产生以下结果：

Connection to database successfully
Database mydb selected
Collection selected succsessfully
Document updated successfully
Updated document {
   "title": "MongoDB Tutorial"
}

Delete a Document

要删除文档，需要使用 remove() 方法。

在以下示例中，我们将移除标题为 MongoDB Tutorial 的文档。以下是删除文档的代码片段：

<?php
   // connect to mongodb
   $m = new MongoClient();
   echo "Connection to database successfully";

   // select a database
   $db = $m->mydb;
   echo "Database mydb selected";
   $collection = $db->mycol;
   echo "Collection selected succsessfully";

   // now remove the document
   $collection->remove(array("title"=>"MongoDB Tutorial"),false);
   echo "Documents deleted successfully";

   // now display the available documents
   $cursor = $collection->find();

   // iterate cursor to display title of documents
   echo "Updated document";

   foreach ($cursor as $document) {
      echo $document["title"] . "\n";
   }
?>

程序执行后，将产生以下结果：

Connection to database successfully
Database mydb selected
Collection selected successfully
Documents deleted successfully

在上述示例中，第二个参数是布尔类型，并用于 remove() 方法的 justOne 字段。

剩余的 MongoDB 方法 findOne(), save(), limit(), skip(), sort() 等同于上述解释。