MongoDB PHP
在php中使用mongodb你必须使用 mongodb的php驱动。
MongoDB PHP在各平台上的安装及驱动包下载请查看:PHP安装MongoDB扩展驱动
确保连接及选择一个数据库
为了确保正确连接,你需要指定数据库名,如果数据库在mongoDB中不存在,mongoDB会自动创建
代码片段如下:
- <?php // 连接到mongodb $m = new MongoClient(); echo "Connection to database successfully"; // 选择一个数据库 $db = $m->mydb;
- echo "Database mydb selected";
- ?>
执行以上程序,输出结果如下:
- Connection to database successfully
- Database mydb selected
创建集合
创建集合的代码片段如下:
- <?php // 连接到mongodb $m = new MongoClient(); echo "Connection to database successfully"; // 选择一个数据库 $db = $m->mydb;
- echo "Database mydb selected";
- $collection = $db->createCollection("mycol");
- echo "Collection created succsessfully";
- ?>
执行以上程序,输出结果如下:
- Connection to database successfully
- Database mydb selected
- Collection created succsessfully
插入文档
在mongoDB中使用 insert() 方法插入文档:
插入文档代码片段如下:
- <?php // 连接到mongodb $m = new MongoClient(); echo "Connection to database successfully"; // 选择一个数据库 $db = $m->mydb;
- echo "Database mydb selected";
- $collection = $db->mycol;
- echo "Collection selected succsessfully";
- $document = array(
- "title" => "MongoDB",
- "description" => "database",
- "likes" => 100,
- "url" => "//www.baidu.com/mongodb/",
- "by", "baidu.com"
- );
- $collection->insert($document);
- echo "Document inserted successfully";
- ?>
执行以上程序,输出结果如下:
- Connection to database successfully
- Database mydb selected
- Collection selected succsessfully
- Document inserted successfully
查找文档
使用find() 方法来读取集合中的文档。
读取使用文档的代码片段如下:
- <?php // 连接到mongodb $m = new MongoClient(); echo "Connection to database successfully"; // 选择一个数据库 $db = $m->mydb;
- echo "Database mydb selected";
- $collection = $db->mycol;
- echo "Collection selected succsessfully";
- $cursor = $collection->find();
- // 迭代显示文档标题
- foreach ($cursor as $document) {
- echo $document["title"] . "\n";
- }
- ?>
执行以上程序,输出结果如下:
- Connection to database successfully
- Database mydb selected
- Collection selected succsessfully
- {
- "title": "MongoDB"
- }
更新文档
使用 update() 方法来更新文档。
以下实例将更新文档中的标题为' MongoDB Tutorial', 代码片段如下:
- <pre>
- <?php // 连接到mongodb $m = new MongoClient(); echo "Connection to database successfully"; // 选择一个数据库 $db = $m->mydb;
- echo "Database mydb selected";
- $collection = $db->mycol;
- echo "Collection selected succsessfully";
- // 更新文档
- $collection->update(array("title"=>"MongoDB"), array('$set'=>array("title"=>"MongoDB Tutorial")));
- echo "Document updated successfully";
- // 显示更新后的文档
- $cursor = $collection->find();
- // 循环显示文档标题
- echo "Updated document";
- foreach ($cursor as $document) {
- echo $document["title"] . "\n";
- }
- ?>
执行以上程序,输出结果如下:
- Connection to database successfully
- Database mydb selected
- Collection selected succsessfully
- Document updated successfully
- Updated document
- {
- "title": "MongoDB Tutorial"
- }
删除文档
使用 remove() 方法来删除文档。
以下实例中我们将移除 'title' 为 'MongoDB Tutorial' 的数据记录。, 代码片段如下:
- <?php // 连接到mongodb $m = new MongoClient(); echo "Connection to database successfully"; // 选择一个数据库 $db = $m->mydb;
- echo "Database mydb selected";
- $collection = $db->mycol;
- echo "Collection selected succsessfully";
- // 移除文档
- $collection->remove(array("title"=>"MongoDB Tutorial"),false);
- echo "Documents deleted successfully";
- // 显示可用文档数据
- $cursor = $collection->find();
- // iterate cursor to display title of documents
- echo "Updated document";
- foreach ($cursor as $document) {
- echo $document["title"] . "\n";
- }
- ?>
执行以上程序,输出结果如下:
- Connection to database successfully
- Database mydb selected
- Collection selected succsessfully
- Documents deleted successfully
除了以上实例外,在php中你还可以使用findOne(), save(), limit(), skip(), sort()等方法来操作Mongodb数据库。