What are the differences between server-side languages like PHP and client-side languages like JavaScript?

Server-side languages like PHP run on the server and are used to generate dynamic content before sending it to the client's browser. Client-side languages like JavaScript run on the client's browser and are used to manipulate the content after it has been received from the server. PHP is used for server-side processing, database operations, and server interactions, while JavaScript is used for client-side interactivity, animations, and form validation.

// PHP code snippet
<?php
  $name = "John";
  echo "Hello, $name!";
?>