How to use Google Cloud Firestore for document storage and query in PHP development

How to use Google Cloud Firestore for document storage and query in PHP development

With the continuous development of cloud computing technology, cloud services have become a necessary part of modern application development. Google Cloud Firestore is a document-based NoSQL database service launched by Google, which provides excellent features such as real-time database, offline data synchronization, strong consistency, automated expansion, and global deployment. This article will mainly introduce how to use Google Cloud Firestore for document storage and query in PHP projects.

Step 1: Create a Google Cloud Firestore project

First you need to log in to your Google Cloud account and create a new project in the Google Cloud Console. Open the Firestore tab in the project and create a new Cloud Firestore database. You can choose test mode or production mode. Test mode allows anyone to access your database, while production mode requires authentication and authorization for access. Record the project ID generated at this time.

Step 2: Install Google Cloud Firestore SDK

Using Google Cloud Firestore in a PHP project requires installing the Google Cloud Firestore SDK. Use the composer command in the terminal to install:

composer require google/cloud-firestore

Step 3: Configure Google Cloud Firestore SDK

Add the following code to configure the Google Cloud Firestore SDK. You need to change the " your_project_id" with the project ID generated in step 1:

<?php
use GoogleCloudFirestoreFirestoreClient;

$firestore = new FirestoreClient([
    'projectId' => 'your_project_id',
]);

Step 4: Store the document

Then you can use the FirestoreClient object to store and query the document. The following is a sample code for using a FirestoreClient object to store a document in a PHP project:

<?php
use GoogleCloudFirestoreFirestoreClient;

$firestore = new FirestoreClient([
    'projectId' => 'your_project_id',
]);

$docRef = $firestore->collection('users')->document('alovelace');
$docRef->set([
    'first' => 'Ada',
    'last' => 'Lovelace',
    'born' => 1815
]);

In the above code, we first create a FirestoreClient object and specify the project ID. Then a users collection is created, a document named "alovelace" is created in it, and its attribute values ​​are set. Among them, "first" represents the first name, "last" represents the last name, and "born" represents the date of birth. After storage is completed, Firestore automatically generates a unique document ID.

Step 5: Query documents

You can use the get() method to find documents. The following is a sample code for querying a document using the FirestoreClient object in a PHP project:

<?php
use GoogleCloudFirestoreFirestoreClient;

$firestore = new FirestoreClient([
    'projectId' => 'your_project_id',
]);

$docRef = $firestore->collection('users')->document('alovelace');
$snapshot = $docRef->snapshot();

if ($snapshot->exists()) {
    printf('User %s was born in %d', $snapshot['first'], $snapshot['born']);
} else {
    printf('Document %s does not exist!', $docRef->name());
}

In the above code, we first obtain the document named "alovelace" and obtain the document snapshot through the snapshot() method. If the document exists, output the name and date of birth of "User"; otherwise, output a prompt message that the document does not exist.

Step 6: Update and delete documents

You can use the update() method to update documents. The following is a sample code for updating a document using the FirestoreClient object in a PHP project:

<?php
use GoogleCloudFirestoreFirestoreClient;

$firestore = new FirestoreClient([
    'projectId' => 'your_project_id',
]);

$docRef = $firestore->collection('users')->document('alovelace');
$docRef->update([
    ['path' => 'first', 'value' => 'Ada King'],
    ['path' => 'born', 'value' => 1816]
]);

In the above code, we first obtain the document named "alovelace" and update the name and date of birth.

You can use the delete() method to delete documents. The following is a sample code for deleting a document using the FirestoreClient object in a PHP project:

<?php
use GoogleCloudFirestoreFirestoreClient;

$firestore = new FirestoreClient([
    'projectId' => 'your_project_id',
]);

$docRef = $firestore->collection('users')->document('alovelace');
$docRef->delete();

In the above code, we called the delete() method on the document named "alovelace" to delete the document.

Conclusion

Google Cloud Firestore is a document-based NoSQL database service launched by Google. It provides excellent features such as real-time database, offline data synchronization, strong consistency, automated expansion, and global deployment. . Use FirestoreClient objects in PHP projects to quickly store and query documents, and to easily update and delete documents. Mastering the use of Google Cloud Firestore can improve the development efficiency of PHP developers.

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