{"id":170,"date":"2026-05-20T16:00:33","date_gmt":"2026-05-20T16:00:33","guid":{"rendered":"https:\/\/gigz.pk\/php\/?post_type=lesson&#038;p=170"},"modified":"2026-05-21T14:43:17","modified_gmt":"2026-05-21T14:43:17","slug":"rest-api-basics","status":"publish","type":"lesson","link":"https:\/\/gigz.pk\/php\/?lesson=rest-api-basics","title":{"rendered":"REST API Basics"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Introduction<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">REST API stands for Representational State Transfer Application Programming Interface. It is a standard way for applications to communicate with each other over the internet using HTTP methods.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">REST APIs allow different software systems, websites, and mobile applications to exchange data efficiently. They are widely used in web development, mobile apps, cloud services, and modern software applications.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Objectives<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">By the end of this training, you will be able to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Understand the concept of REST APIs<\/li>\n\n\n\n<li>Learn how APIs work<\/li>\n\n\n\n<li>Understand HTTP methods<\/li>\n\n\n\n<li>Send and receive JSON data<\/li>\n\n\n\n<li>Work with API requests and responses<\/li>\n\n\n\n<li>Test APIs using tools<\/li>\n\n\n\n<li>Integrate APIs into applications<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What is an API<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An API is a bridge that allows two applications to communicate with each other.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A weather app gets weather data from a weather API<\/li>\n\n\n\n<li>A payment gateway connects through APIs<\/li>\n\n\n\n<li>Social media login systems use APIs<\/li>\n\n\n\n<li>E-commerce websites connect with delivery APIs<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What is REST<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">REST is an architectural style used to design APIs. REST APIs use standard HTTP requests to perform operations on resources.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">REST APIs are simple, scalable, and widely supported across platforms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Key Features of REST API<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Stateless Communication<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Each API request contains all required information. The server does not store client session data.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Client Server Architecture<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The client and server work independently from each other.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Uses HTTP Protocol<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">REST APIs use standard HTTP methods like GET, POST, PUT, and DELETE.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Supports Multiple Formats<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">REST APIs commonly use JSON and XML formats for data exchange.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Understanding HTTP Methods<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">GET<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Used to retrieve data from the server.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GET \/users<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">POST<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Used to send new data to the server.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>POST \/users<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">PUT<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Used to update existing data.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>PUT \/users\/1<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">DELETE<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Used to remove data from the server.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DELETE \/users\/1<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Understanding API Endpoints<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An endpoint is a URL where the API can be accessed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>https:&#47;&#47;api.example.com\/users<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Here:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>https:\/\/<\/code> is the protocol<\/li>\n\n\n\n<li><code>api.example.com<\/code> is the server<\/li>\n\n\n\n<li><code>\/users<\/code> is the endpoint<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">JSON in REST APIs<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JSON stands for JavaScript Object Notation. It is the most common format used in REST APIs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example JSON Response:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{<br>  \"id\": 1,<br>  \"name\": \"Ali\",<br>  \"email\": \"ali@example.com\"<br>}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">API Request Example<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Example API Request:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GET https:\/\/api.example.com\/products<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Example API Response:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;<br>  {<br>    \"id\": 1,<br>    \"name\": \"Laptop\"<br>  },<br>  {<br>    \"id\": 2,<br>    \"name\": \"Mobile\"<br>  }<br>]<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Status Codes in REST APIs<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">200 OK<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Request completed successfully.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">201 Created<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">New resource created successfully.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">400 Bad Request<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Invalid request sent by the client.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">401 Unauthorized<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Authentication is required.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">404 Not Found<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Requested resource was not found.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">500 Internal Server Error<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Server encountered an error.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tools for Testing REST APIs<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Popular API testing tools include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Postman<\/li>\n\n\n\n<li>Insomnia<\/li>\n\n\n\n<li>Swagger<\/li>\n\n\n\n<li>cURL<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These tools help developers send requests and analyze responses.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Authentication in REST APIs<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">APIs often require authentication for security.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common authentication methods:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>API Keys<\/li>\n\n\n\n<li>Bearer Tokens<\/li>\n\n\n\n<li>OAuth Authentication<\/li>\n\n\n\n<li>JWT Tokens<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Advantages of REST APIs<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Easy to understand<\/li>\n\n\n\n<li>Platform independent<\/li>\n\n\n\n<li>Fast communication<\/li>\n\n\n\n<li>Scalable architecture<\/li>\n\n\n\n<li>Supports mobile and web applications<\/li>\n\n\n\n<li>Widely used in modern development<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Real World Uses of REST APIs<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">REST APIs are used in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Social media platforms<\/li>\n\n\n\n<li>Online payment systems<\/li>\n\n\n\n<li>E-commerce applications<\/li>\n\n\n\n<li>Mobile applications<\/li>\n\n\n\n<li>Cloud platforms<\/li>\n\n\n\n<li>Weather and map services<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Best Practices for REST APIs<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use meaningful endpoint names<\/li>\n\n\n\n<li>Follow proper HTTP methods<\/li>\n\n\n\n<li>Use JSON format consistently<\/li>\n\n\n\n<li>Implement authentication<\/li>\n\n\n\n<li>Handle errors properly<\/li>\n\n\n\n<li>Maintain API documentation<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Career Opportunities<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Learning REST APIs can help you become:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Backend Developer<\/li>\n\n\n\n<li>API Developer<\/li>\n\n\n\n<li>Full Stack Developer<\/li>\n\n\n\n<li>Mobile App Developer<\/li>\n\n\n\n<li>Software Engineer<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Final Presentation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In your final presentation, explain:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What REST API is<\/li>\n\n\n\n<li>How APIs work<\/li>\n\n\n\n<li>Common HTTP methods<\/li>\n\n\n\n<li>JSON data format<\/li>\n\n\n\n<li>API endpoints and responses<\/li>\n\n\n\n<li>Authentication methods<\/li>\n\n\n\n<li>Real-world API exatra<\/li>\n<\/ul>\n\n\n<div class=\"yoast-breadcrumbs\"><span><span><a href=\"https:\/\/gigz.pk\/php\">Home<\/a><\/span> \u00bb <span class=\"breadcrumb_last\" aria-current=\"page\">Professional PHP > API Development > REST API Basics<\/span><\/span><\/div>\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1779292842494\"><strong class=\"schema-faq-question\"><\/strong> <p class=\"schema-faq-answer\"><\/p> <\/div> <\/div>\n","protected":false},"menu_order":60,"template":"","class_list":["post-170","lesson","type-lesson","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>REST API Basics - Learn PHP with GiGz.PK<\/title>\n<meta name=\"description\" content=\"Learn REST API basics including HTTP methods, JSON, endpoints, authentication, and API testing for beginners.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gigz.pk\/php\/?lesson=rest-api-basics\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"REST API Basics - Learn PHP with GiGz.PK\" \/>\n<meta property=\"og:description\" content=\"Learn REST API basics including HTTP methods, JSON, endpoints, authentication, and API testing for beginners.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gigz.pk\/php\/?lesson=rest-api-basics\" \/>\n<meta property=\"og:site_name\" content=\"Learn PHP with GiGz.PK\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-21T14:43:17+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/gigz.pk\\\/php\\\/?lesson=rest-api-basics\",\"url\":\"https:\\\/\\\/gigz.pk\\\/php\\\/?lesson=rest-api-basics\",\"name\":\"REST API Basics - Learn PHP with GiGz.PK\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/gigz.pk\\\/php\\\/#website\"},\"datePublished\":\"2026-05-20T16:00:33+00:00\",\"dateModified\":\"2026-05-21T14:43:17+00:00\",\"description\":\"Learn REST API basics including HTTP methods, JSON, endpoints, authentication, and API testing for beginners.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/gigz.pk\\\/php\\\/?lesson=rest-api-basics#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/gigz.pk\\\/php\\\/?lesson=rest-api-basics\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/gigz.pk\\\/php\\\/?lesson=rest-api-basics#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/gigz.pk\\\/php\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Professional PHP > API Development > REST API Basics\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/gigz.pk\\\/php\\\/#website\",\"url\":\"https:\\\/\\\/gigz.pk\\\/php\\\/\",\"name\":\"Learn PHP with GiGz.PK\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/gigz.pk\\\/php\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"REST API Basics - Learn PHP with GiGz.PK","description":"Learn REST API basics including HTTP methods, JSON, endpoints, authentication, and API testing for beginners.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/gigz.pk\/php\/?lesson=rest-api-basics","og_locale":"en_US","og_type":"article","og_title":"REST API Basics - Learn PHP with GiGz.PK","og_description":"Learn REST API basics including HTTP methods, JSON, endpoints, authentication, and API testing for beginners.","og_url":"https:\/\/gigz.pk\/php\/?lesson=rest-api-basics","og_site_name":"Learn PHP with GiGz.PK","article_modified_time":"2026-05-21T14:43:17+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":["WebPage","FAQPage"],"@id":"https:\/\/gigz.pk\/php\/?lesson=rest-api-basics","url":"https:\/\/gigz.pk\/php\/?lesson=rest-api-basics","name":"REST API Basics - Learn PHP with GiGz.PK","isPartOf":{"@id":"https:\/\/gigz.pk\/php\/#website"},"datePublished":"2026-05-20T16:00:33+00:00","dateModified":"2026-05-21T14:43:17+00:00","description":"Learn REST API basics including HTTP methods, JSON, endpoints, authentication, and API testing for beginners.","breadcrumb":{"@id":"https:\/\/gigz.pk\/php\/?lesson=rest-api-basics#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/gigz.pk\/php\/?lesson=rest-api-basics"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/gigz.pk\/php\/?lesson=rest-api-basics#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/gigz.pk\/php"},{"@type":"ListItem","position":2,"name":"Professional PHP > API Development > REST API Basics"}]},{"@type":"WebSite","@id":"https:\/\/gigz.pk\/php\/#website","url":"https:\/\/gigz.pk\/php\/","name":"Learn PHP with GiGz.PK","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/gigz.pk\/php\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/gigz.pk\/php\/index.php?rest_route=\/wp\/v2\/lesson\/170","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gigz.pk\/php\/index.php?rest_route=\/wp\/v2\/lesson"}],"about":[{"href":"https:\/\/gigz.pk\/php\/index.php?rest_route=\/wp\/v2\/types\/lesson"}],"wp:attachment":[{"href":"https:\/\/gigz.pk\/php\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}