PHP
PHP Performance Optimization
Where PHP applications actually spend their time, how to measure before you optimise, and the fixes that matter: OPcache, N+1 queries, indexes…
PHP
Server-side PHP explained simply — forms, sessions, databases and the errors that stop beginners. Practical examples you can run on a local server.
17 guides
PHP
Working with APIs in PHP
Call a REST API from PHP with cURL or Guzzle, handle JSON and errors properly, add authentication, and build a small API…
PHP
PHP PDO Explained With Examples
PDO is the standard way to talk to a database from PHP. Connecting, prepared statements that stop SQL injection, fetching rows, transactions…
PHP
Introduction to PHP
What PHP is, how it differs from JavaScript, how a request becomes a page, and your first working script — with the…
PHP
PHP 7 vs PHP 8: What Changed and Whether to Upgrade
PHP 7 has been end-of-life since 2022. What PHP 8 changed in the language, what breaks when you move, why the upgrade…
PHP
PHP Errors Not Showing in the Browser: display_errors and error_reporting
A blank white page and no error anywhere is PHP hiding the problem on purpose. Here is how to see errors in…
PHP
PHP Code Showing as Plain Text Instead of Running
Your PHP appears in the browser as source code, or the page is blank where the output should be. The file is…
PHP
PHP Security Best Practices
The security work that actually matters in PHP: prepared statements, output escaping, CSRF tokens, password hashing, file uploads and session handling.
PHP
Working with Files and Directories in PHP
Read, write, append and delete files in PHP, list directories safely, handle permissions errors, and avoid the path traversal mistake that makes…
PHP
What’s New in PHP 8.5: The Pipe Operator, URI Extension and Clone With
PHP 8.5 shipped in November 2025 with a pipe operator, a built-in URI parser, a clone-with syntax and array_first. What each one…
PHP
PHP Not Working With Apache on Ubuntu or Debian After an Upgrade
Apache serving PHP files as downloads or blank pages after a release upgrade? The PHP module version no longer matches. Here is…
PHP
PHP Frameworks Explained: Which One and Why
What a framework gives you over plain PHP, how Laravel, Symfony, CodeIgniter and Slim differ, and when writing it yourself is still…
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Where to go next
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The ideas every language shares — variables, loops, functions and how a program actually runs.
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Plain-English Python guides, from your first line of code to small programs that do real work.
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JavaScript
How JavaScript works in the browser, explained with short examples you can paste and run.
32 guides
Keep going — pick your next guide
The fastest way to improve is to read one guide, then build the thing it describes. Start with the basics, or jump straight to a project.