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What are the performance implications of using PHP frameworks like Smarty for templating compared to custom PHP solutions?

Using PHP frameworks like Smarty for templating can have performance implications compared to custom PHP solutions because frameworks often come with additional overhead and abstraction layers that can slow down the rendering process. To optimize performance, you can consider using a custom PHP solution tailored to your specific needs and avoiding unnecessary framework features.

php 
// Custom PHP templating solution without using a framework like Smarty
function render_template($template, $data) {
    extract($data);
    ob_start();
    include($template);
    return ob_get_clean();
}

// Example usage
$template = 'path/to/template.php';
$data = ['name' => 'John Doe', 'age' => 30];
echo render_template($template, $data);

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