How can concatenation be correctly implemented when using variables in PHP to generate HTML content?

When using variables in PHP to generate HTML content, concatenation can be implemented by using the dot (.) operator to combine strings and variables. This allows for dynamic content generation within HTML elements. By properly concatenating strings and variables, you can create customized HTML output based on the values of the variables.

<?php
$name = "John";
$age = 25;

$html_content = "<p>Name: " . $name . "</p>";
$html_content .= "<p>Age: " . $age . "</p>";

echo $html_content;
?>