What is the correct syntax for closing an image tag in PHP when displaying images from URLs?

When displaying images from URLs in PHP, you need to make sure to close the image tag properly to avoid any syntax errors. The correct syntax for closing an image tag in PHP is by using a forward slash before the closing angle bracket, like this: <img src="image_url" />. This self-closing tag ensures that the image tag is properly closed and displayed correctly on the webpage.

echo '<img src="image_url" />';