require_once __DIR__.'/vendor/autoload.php';

function sampleFunc($params) {
    $atts = $params["atts"];
    $args = $params["args"];

    $name = $atts["name"];
    $age = $args["age"];
    
    return "<p>Name: $name</p><p>Age: $age</p>";
}

$content = '
    <p>Some other elements</p>
    [sample name="Alex"]
    <p>Some other elements</p>
';

$handler = new ShortcodeHandler();
$handler->addShortcode('sample', 'sampleFunc', ['age' => 18]);

$content = $handler->handle($content);
print_r($content);

结果

<p>Some other elements</p>
<p>Name: Alex</p><p>Age: 18</p>
<p>Some other elements</p>

安装

通过composer

composer require barbashin-andrey/shortcode