A frontend React component uses Javascript Fetch API to make a request to the backend API built on PHP. The frontend cannot use secret keys since they would be exposed in the build. What is the best way for the backend PHP code to authorize the request, ensuring that the request is authentic and from the same origin? Are there PHP variables that can reliably authenticate the request?
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About the technologies asked in this question
PHP
PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites.
The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license. https://www.php.net/
JavaScript
JavaScript is a multi-paradigm language that supports event-driven, functional, and mandatory (including object-oriented and prototype-based) programming types. Originally JavaScript was only used on the client side. JavaScript is now still used as a server-side programming language. To summarize, we can say that JavaScript is the language of the Internet. https://www.javascript.com/
React
React is currently the leader in JavaScript UI frameworks. First, the Facebook developers started working on this to make their job easier. An app called Facebook Ads grew very quickly, which meant complex management and support. As a result, the team began to create a structure that would help them with efficiency. They had an early prototype before 2011, and two years later, the framework was open source and available to the public. It is currently used by many business giants: AirBNB, PayPal, Netflix, etc. https://reactjs.org/
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