Build a Practical Templates and Presentation Example in Modern PHP Web Development

Define the build target

For Templates and Presentation, run a PHP script, model one domain object, pass safe data into a template, and verify both normal output and an invalid input case. Build the boundary case using this implementation lens: Use Composer-managed PHP application boundaries, PSR-style HTTP requests and handlers, templates, PDO-backed domain data, validation, sessions/passwords, PHPUnit feedback, and deployment/security configuration as concrete evidence.

Keep the Templates and Presentation build centered on these technical constraints: PHP CLI/runtime and errors. Classes, visibility, and typed methods. Apply them through this path lens: Use Composer-managed PHP application boundaries, PSR-style HTTP requests and handlers, templates, PDO-backed domain data, validation, sessions/passwords, PHPUnit feedback, and deployment/security configuration as concrete evidence. Use Composer-managed PHP application boundaries, PSR-style HTTP requests and handlers, templates, PDO-backed domain data, validation, sessions/passwords, PHPUnit feedback, and deployment/security configuration as concrete evidence.

Implement the core behavior

Implement Templates and Presentation around the module artifact—a working templates and presentation exercise with a documented technical result—and keep the implementation specific to this path context: Use Composer-managed PHP application boundaries, PSR-style HTTP requests and handlers, templates, PDO-backed domain data, validation, sessions/passwords, PHPUnit feedback, and deployment/security configuration as concrete evidence.

<?php
final class Profile {
    public function __construct(public string $name, public string $bio) {}
}
$profile = new Profile('Ava', '<script>alert(1)</script>');
?>
<h1><?= htmlspecialchars($profile->name, ENT_QUOTES, 'UTF-8') ?></h1>
<p><?= htmlspecialchars($profile->bio, ENT_QUOTES, 'UTF-8') ?></p>

php -S 127.0.0.1:8000 profile.php

The object supplies typed data and the template escapes untrusted HTML instead of executing it.

practice/\n├── README.md\n├── templates-and-presentation-build.php\n└── evidence/\n    └── expected-result.txt

Run the complete path

Run one realistic Templates and Presentation case end to end and record the required evidence: the module-specific command, output, test, rendered state, query result, log, or measurement that proves the exercise worked. Interpret the result through this path context: Use Composer-managed PHP application boundaries, PSR-style HTTP requests and handlers, templates, PDO-backed domain data, validation, sessions/passwords, PHPUnit feedback, and deployment/security configuration as concrete evidence.

Change one meaningful condition

Modify one condition central to Templates and Presentation using this path context: Use Composer-managed PHP application boundaries, PSR-style HTTP requests and handlers, templates, PDO-backed domain data, validation, sessions/passwords, PHPUnit feedback, and deployment/security configuration as concrete evidence. Predict the new result before rerunning the same workflow.

Verify the artifact

Your deliverable is a working templates and presentation exercise with a documented technical result.

Common mistakes to avoid

• Wrong PHP/runtime configuration.
• Business logic embedded in templates.
• Unescaped output.
• State mutated from multiple layers.