Skip to main content

JS Fetch with PHP RESTful API, Login Authentication - #76

Like what you see, support the channel.

Published: October 01, 2021

Estimated Reading Time
2 minutes
Video Duration
28:47 minutes

Last week we built a simple API using PHP, this week we tie it all together with our vanilla JavaScript login application. Using JS Fetch, we send a username and password as JSON to our API, validate that against our database, then finally return with an error message or a single user account.

This project will teach you about the basics of JS fetch and how to encode and send JSON data using JS. It will also show you how to get that JSON data and interpret it in a way our API can understand and return the correct information or messages.

00:00 Intro

01:55 JavaScript Fetch

07:53 Handling CORS Policy Errors

11:04 Capturing JSON Data in PHP

14:49 Capturing & Displaying Errors in JS

21:56 Passing User Information on Success

24:22 Displaying User Information on Dashboard

Become a Patreon to show support and get exclusive access to content:

Applications Used

Visual Studio Code v1.43:

WAMP v3.2.0:

Computer Hardware:

Windows 10 Pro: (Amazon)

Samsung 500GB External SSD: (Amazon)

Samsung 970 EVO Plus SSD 1TB - M.2 NVMe: (Amazon)

Rosewill Hive-750S R750W PSU: (Amazon)

Phanteks Eclipse Tempered Glass Case: (Amazon)

MSI Arsenal Gaming AMD Ryzen Motherboard: (Amazon)

MSI Gaming GeForce RTX 2060 Super 8GB: (Amazon)

LG 34UM69G-B 34-Inch 21:9 UltraWide IPS Monitor: (Amazon)

Corsair 64GB (4 x 16GB) DDR4 Memory: (Amazon)

AMD Ryzen 7 2700X Processor: (Amazon)

Dell XPS 15 9500 15.6" Laptop / Windows: (Amazon)

Lenovo ThinkPad T15 15.6" Laptop / Linux: (Amazon)


Fujifilm X-T3: (Amazon)

Fujinon XF18-55mmF2.8-4: (Amazon)


Audio Technica AT2020: (Amazon)

Blue Snowball iCE: (Amazon)


I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.