php-developmentlisted

# PHP Development > Optimized for current PHP 8.x releases, PHPUnit 11+, Composer 2.x, and PDO-backed MySQL or MariaDB apps. Expert guidance for building high-quality PHP applications with PHP 8.0+, PDO for secure database access, RESTful API design, and XAMPP environment configuration following official PHP documentation at https://php.net. - Leverage native parallel subagent dispatch and 200k+ context windows where available. ## Anti-Patterns - Interpolating SQL directly: Prepared statements are the baseline for correctness and security in PHP data access. - Mixing request parsing, business rules, and rendering: Tightly coupled scripts are harder to test and evolve into APIs. - Assuming validation alone prevents XSS: Output encoding still matters when user-controlled content is rendered back to HTML. ## Verification Protocol Before claiming "skill applied successfully": 1. Pass/fail: The PHP Development implementation names the target runtime, framework version, and affected files. 2. Pass/fail: Build, lint, test, or equivalent local validation is run for the changed surface. 3. Pass/fail: Edge cases for errors, dependency drift, and environment differences are addressed or explicitly out of scope. 4. Pressure-test scenario: Apply the workflow to a change that passes happy-path tests but fails one boundary condition. 5. Success metric: Zero untested success claims; every implementation claim maps to a command or artifact. ## Before and After Example ```php <?php