Is it necessary to check the file extension of an image when verifying its size in PHP?

When verifying the size of an image in PHP, it is not necessary to check the file extension. The file extension does not necessarily correspond to the actual content of the file, so relying on it to determine the file type is not reliable. Instead, you can use functions like getimagesize() or exif_imagetype() to accurately determine the image size without relying on the file extension.

$image_path = 'path/to/image.jpg';

// Get the image size using getimagesize()
$image_info = getimagesize($image_path);
$image_width = $image_info[0];
$image_height = $image_info[1];

echo "Image width: $image_width, Image height: $image_height";