What are the potential issues with using the same ID for multiple elements in a PHP-driven web application?

Using the same ID for multiple elements in a PHP-driven web application can cause conflicts and lead to unexpected behavior in the application. To solve this issue, ensure that each element has a unique ID to avoid conflicts in styling and scripting.

<div id="element1"></div>
<div id="element2"></div>
<div id="element3"></div>