30PHP连接MongoDB操作

要进行连接，需要指定数据库名称，如果数据库不存在，那么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<br/>";
   // select a database
   $db = $m->mydb;

   echo "Database mydb selected";
?>
PHP

执行程序时，会产生以下结果 –

Connection to database successfully
Database mydb selected
Shell

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("phpcol");
   echo "Collection created succsessfully";
?>
PHP

执行程序时，会产生以下结果 –

Connection to database successfully
Database mydb selected
Collection created succsessfully
Shell

要将文档插入到MongoDB中，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->phpcol;
   echo "Collection selected succsessfully";

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

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

执行程序时，会产生以下结果 –

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

要从集合中选择所有文档，请使用find()方法。

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

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

   $cursor = $collection->find();
   // iterate cursor to display title of documents

   foreach ($cursor as $document) {
      echo $document["title"]. ', URL is=> ' .$document["url"] .  "
";
   }
?>
PHP

以下是选择所有文档的代码片段 –

Connection to database successfully
Database mydb selected
Collection selected succsessfully 
MongoDB, URL is=> http://www.yiibai.com/mongodb/
Shell

要更新文档，需要使用update()方法。

在下面的例子中，将把插入的文档的标题更新为：MongoDB教程 。 以下是更新文档的代码段 –

<?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教程")));
   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 $document["title"] .', URL => '.$document["url"] . "
";
   }
?>
PHP

以下是选择所有文档的代码片段 –

Connection to database successfully
Database mydb selected
Collection selected succsessfully 
MongoDB, URL is=> http://www.yiibai.com/mongodb/
Shell

要删除文档，可使用remove()方法。

在下面的示例中，将删除标题为：MongoDB教程 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->phpcol;
   echo "Collection selected succsessfully";

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

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

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

以下是选择所有文档的代码片段 –

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

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()等与上述相同。