PHP

要想在 MongoDB 上使用 PHP，需要使用 mongodb PHP 驅(qū)動(dòng)。從該鏈接處下載 PHP 驅(qū)動(dòng)。確保下載的是最新版。將其解壓縮，并將 php_mongo.dll 文件放到 PHP 擴(kuò)展目錄中（默認(rèn)為 “ext”），然后把下列代碼放到 php.ini 文件中：

extension=php_mongo.dll

創(chuàng)建連接并選擇數(shù)據(jù)庫

創(chuàng)建連接需要指定數(shù)據(jù)庫名稱，如果數(shù)據(jù)庫不存在，則 mongodb 會(huì)自動(dòng)創(chuàng)建它。

連接數(shù)據(jù)庫的代碼如下所示：

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

該程序的執(zhí)行結(jié)果如下所示：

Connection to database successfully
Database mydb selected

創(chuàng)建集合

創(chuàng)建集合的代碼如下所示：

<?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";
?>

執(zhí)行程序的結(jié)果如下所示：

Connection to database successfully
Database mydb selected
Collection created succsessfully

插入文檔

插入文檔使用 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";
?>

執(zhí)行程序的結(jié)果如下所示：

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

尋找所有文檔

選擇集合中的所有文檔，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";
   }
?>

程序執(zhí)行的結(jié)果如下所示：

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

更新文檔

更新文檔使用 update() 方法。

下例將把插入文檔的標(biāo)題改為 MongoDB Tutorial。代碼段如下所示：

<?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";
   }
?>

程序執(zhí)行的結(jié)果如下所示：

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

刪除文檔

刪除文檔使用 remove() 方法。

下例中將把標(biāo)題為 MongoDB Tutorial 的文檔全部刪除。代碼如下所示：

<?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";
   }
?>

程序執(zhí)行的結(jié)果如下所示：

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

在上述范例中，第二個(gè)參數(shù)是布爾值類型，用于 remove() 方法的 justOne 字段。

剩余的 mongodb 的 findOne()、save()、limit()、skip()、sort() 等方法將在教程剩余部分予以介紹。