要想在 MongoDB 上使用 PHP，需要使用 mongodb PHP 驱动。从该链接处下载 PHP 驱动。确保下载的是最新版。将其解压缩，并将 php_mongo.dll 文件放到 PHP 扩展目录中（默认为 “ext”），然后把下列代码放到 php.ini 文件中：
extension=php_mongo.dll
创建连接并选择数据库
创建连接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。
连接数据库的代码如下所示：
<?php // connect to mongodb $m = new MongoClient(); echo "Connection to database successfully"; // select a database $db = $m->mydb; echo "Database mydb selected"; ?>
该程序的执行结果如下所示：
Connection to database successfully Database mydb selected
创建集合
创建集合的代码如下所示：
<?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";
?>执行程序的结果如下所示：
Connection to database successfully Database mydb selected Collection created succsessfully
插入文档
插入文档使用 insert() 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->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"; ?>
执行程序的结果如下所示：
Connection to database successfully Database mydb selected Collection selected succsessfully Document inserted successfully
寻找所有文档
选择集合中的所有文档，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->mycol;
echo "Collection selected succsessfully";
$cursor = $collection->find();
// iterate cursor to display title of documents
foreach ($cursor as $document) {
echo $document["title"] . "\n";
}
?>程序执行的结果如下所示：
Connection to database successfully
Database mydb selected
Collection selected succsessfully
{
"title": "MongoDB"
}更新文档
更新文档使用 update() 方法。
下例将把插入文档的标题改为 MongoDB Tutorial。代码段如下所示：
<?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";
}
?>程序执行的结果如下所示：
Connection to database successfully
Database mydb selected
Collection selected succsessfully
Document updated successfully
Updated document
{
"title": "MongoDB Tutorial"
}删除文档
删除文档使用 remove() 方法。
下例中将把标题为 MongoDB Tutorial 的文档全部删除。代码如下所示：
<?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";
}
?>程序执行的结果如下所示：
Connection to database successfully Database mydb selected Collection selected succsessfully Documents deleted successfully
在上述范例中，第二个参数是布尔值类型，用于 remove() 方法的 justOne 字段。
剩余的 mongodb 的 findOne()、save()、limit()、skip()、sort() 等方法将高级教程部分予以介绍。
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