MongoDB - PHP

MongoDB - PHP

To use MongoDB with PHP, you need to use MongoDB PHP driver. Download the driver from the MongoDB PHP Driver download page. Make sure to download the latest release of it. Now unzip the archive and put php_mongo.dll in your PHP extension directory (ext by default) and add the following line to your php.ini file:

extension = php_mongo.dll

Make a Connection and Select a Database

To make a connection, you need to specify the database name. If the database doesn't exist, MongoDB creates it automatically.

Following is the code snippet to connect to the database:

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

When the program is executed, it will produce the following result:

Connection to database successfully
Database mydb selected

Create a Collection

Following is the code snippet to create a collection:

<?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 successfully";
?>

When the program is executed, it will produce the following result:

Connection to database successfully
Database mydb selected
Collection created successfully

Insert a Document

To insert a document into MongoDB, insert() method is used.

Following is the code snippet to insert a document:

<?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 successfully";
   
   $document = array( 
      "title" => "MongoDB", 
      "description" => "database", 
      "likes" => 100,
      "url" => "http://www.tutorialspoint.com/mongodb/",
      "by" => "tutorials point"
   );
   
   $collection->insert($document);
   echo "Document inserted successfully";
?>

When the program is executed, it will produce the following result:

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

Find All Documents

To select all documents from the collection, find() method is used.

Following is the code snippet to select all documents:

<?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 successfully";
   $cursor = $collection->find();
   // iterate cursor to display title of documents
   
   foreach ($cursor as $document) {
      echo $document["title"] . "\n";
   }
?>

When the program is executed, it will produce the following result:

Connection to database successfully
Database mydb selected
Collection selected successfully
title: MongoDB

Update a Document

To update a document, you need to use the update() method.

In the following example, we will update the title of the inserted document to MongoDB Tutorial. Following is the code snippet to update a document:

<?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 successfully";
   // 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";
   }
?>

When the program is executed, it will produce the following result:

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

Delete a Document

To delete a document, you need to use the remove() method.

In the following example, we will remove the documents that have the title MongoDB Tutorial. Following is the code snippet to delete a document:

<?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 successfully";
   
   // 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";
   }
?>

When the program is executed, it will produce the following result:

Connection to database successfully
Database mydb selected
Collection selected successfully
Documents deleted successfully
Updated document

In the above example, the second parameter is a boolean type and used for the justOne field of the remove() method.

Remaining MongoDB methods such as findOne(), save(), limit(), skip(), sort() etc., work the same way as explained above.

Step	Description
Connect to MongoDB	Establish a connection to the MongoDB server.
Select Database	Choose the database to work with.
Create Collection	Create a new collection within the selected database.
Insert Document	Add a new document to the collection.
Find Documents	Retrieve documents from the collection.
Update Document	Modify existing documents in the collection.
Delete Document	Remove documents from the collection.