What alternative methods can be used to create popups on a website without relying on PHP?

One alternative method to create popups on a website without relying on PHP is to use JavaScript. By utilizing JavaScript, you can easily create popups that can be triggered by various events such as button clicks or page load. This provides a more dynamic and interactive user experience without the need for server-side processing. ```html <!DOCTYPE html> <html> <head> <title>Popup Example</title> <script> function openPopup() { var popup = window.open("popup.html", "Popup", "width=400,height=400"); } </script> </head> <body> <button onclick="openPopup()">Open Popup</button> </body> </html> ```