Creating Reusable PHP View Templates

PHP view templates turn controller data into HTML and escape values at their output context.

What It Does

PHP view templates turn controller data into HTML and escape values at their output context. The following examples distinguish a normal use case, a boundary case and a practical application.

Requirements and Compatibility

PHP 8.x and a local test environment. Apply input validation, correct error handling and the requirements of any optional libraries.

The code focuses on the core concept. Production implementation may also need routes, validation, persistence, authorization or deployment tooling.

Example 1: Basic Behavior

Understand the primary operation and its inputs.

<?php
$title = '<script>alert(1)</script>';
echo '<h1>' . htmlspecialchars($title, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8') . '</h1>';

Example 2: Another Case

Check failure behavior or a different execution path.

<?php
$items = ['Tea', 'Coffee'];
$html = '<ul>';
foreach ($items as $item) $html .= '<li>' . htmlspecialchars($item, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8') . '</li>';
echo $html . '</ul>';

Practical Example: Putting It to Use

Apply the behavior in a small, controlled scenario.

<?php
function renderCard(string $heading, int $price): string { return '<article><h2>' . htmlspecialchars($heading, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8') . '</h2><p>' . $price . '</p></article>'; }
echo renderCard('Book', 8);

Important Behavior and Edge Cases

Never put raw request data directly into markup or reuse HTML escaping for JavaScript contexts.

Comparison with Related Functions or Approaches

Common Beginner Mistakes

Key Takeaways

• PHP view templates turn controller data into HTML and escape values at their output context.
• Never put raw request data directly into markup or reuse HTML escaping for JavaScript contexts.
• Simple include templates work until a full template engine becomes useful.

Before adapting these examples, verify the return values, test the failure paths and confirm that your application meets its security and environment requirements.