MongoDB – PHP

要在 PHP 中使用 MongoDB，您需要使用 MongoDB PHP 驱动程序。从 url Download PHP Driver 下载驱动程序。确保下载它的最新版本。现在解压缩存档并将 php_mongo.dll 放在您的 PHP 扩展目录中（默认为“ext”），并将以下行添加到您的 php.ini 文件中 –

extension = php_mongo.dll

建立连接并选择数据库

要建立连接，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。

以下是连接到数据库的代码片段 –

<?php
   // connect to mongodb
   $m = new MongoClient();
	
   echo "Connection to database successfully";
   // select a database
   $db = $m->mydb;
	
   echo "Database mydb selected";
?>

当程序执行时，它会产生以下结果 –

Connection to database successfully
Database mydb selected

创建集合

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";
?>

当程序执行时，它会产生以下结果 –

Connection to database successfully
Database mydb selected
Collection created succsessfully

插入文档

要将文档插入 MongoDB，请使用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";
?>

当程序执行时，它会产生以下结果 –

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

查找所有文档

要从集合中选择所有文档，请使用 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";
   }
?>

当程序执行时，它会产生以下结果 –

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

更新文档

要更新文档，您需要使用 update() 方法。

在以下示例中，我们将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";
   }
?>

当程序执行时，它会产生以下结果 –

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

删除文档

要删除文档，您需要使用 remove() 方法。

在以下示例中，我们将删除标题为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";
   }
?>

当程序执行时，它会产生以下结果 –

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

在上面的例子中，第二个参数是布尔类型，用于remove()方法的justOne字段。

其余的 MongoDB 方法findOne()、save()、limit()、skip()、sort()等的工作方式与上面解释的相同。