MongoDB 与PHP一起使用
要将MongoDB与PHP一起使用,您需要使用MongoDB PHP驱动程序。从以下网址下载驱动程序 下载PHP驱动程序 。确保下载最新版本的驱动程序。现在解压缩存档并将php_mongo.dll放入您的PHP扩展目录(默认为“ext”),然后在您的php.ini文件中添加以下行−
extension = php_mongo.dll
建立连接并选择数据库
为了建立连接,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。
下面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 databasedb = $m->mydb;
echo "Database mydb selected";
?>
当程序被执行时,将会产生以下结果−
Connection to database successfully
Database mydb selected
创建一个集合
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 databasedb = m->mydb;
echo "Database mydb selected";collection = $db->createCollection("mycol");
echo "Collection created succsessfully";
?>
当程序执行时,它将产生以下结果 –
Connection to database successfully
Database mydb selected
Collection created succsessfully
插入文档
要将文档插入MongoDB,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 databasedb = 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";
?>
当程序被执行时,将产生以下结果−
Connection to database successfully
Database mydb selected
Collection selected succsessfully
Document inserted successfully
查找所有文档
使用find()方法选择集合中的所有文档。
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 databasedb = 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) {
echodocument["title"] . "\n";
}
?>
当程序执行时,将产生以下结果−
Connection to database successfully
Database mydb selected
Collection selected succsessfully {
"title": "MongoDB"
}
更新文档
要更新一个文档,你需要使用update()方法。
在下面的示例中,我们将更新插入文档的标题为 MongoDB教程 。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 databasedb = m->mydb;
echo "Database mydb selected";collection = db->mycol;
echo "Collection selected succsessfully";
// now update the documentcollection->update(array("title"=>"MongoDB"),
array('set'=>array("title"=>"MongoDB Tutorial")));
echo "Document updated successfully";
// now display the updated documentcursor = collection->find();
// iterate cursor to display title of documents
echo "Updated document";
foreach (cursor as document) {
echodocument["title"] . "\n";
}
?>
当程序被执行时,将会产生以下结果−
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。以下是删除文档的示例代码段:
<?php
// connect to mongodb
m = new MongoClient();
echo "Connection to database successfully";
// select a databasedb = m->mydb;
echo "Database mydb selected";collection = db->mycol;
echo "Collection selected succsessfully";
// now remove the documentcollection->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 asdocument) {
echo $document["title"] . "\n";
}
?>
当程序执行时,将产生以下结果:
Connection to database successfully
Database mydb selected
Collection selected successfully
Documents deleted successfully
在上面的示例中,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,都与上面解释的一样。