In the context of the code snippet provided, what is the significance of passing the variable $pic as a parameter in the getimagesize function in PHP?

Passing the variable $pic as a parameter in the getimagesize function in PHP allows the function to retrieve the dimensions of the image file specified by the variable. This is important because without passing the variable, the function would not know which image file to analyze. By passing $pic as a parameter, the getimagesize function can accurately determine the width and height of the image.

$pic = "image.jpg";
list($width, $height) = getimagesize($pic);
echo "Image width: " . $width . "px<br>";
echo "Image height: " . $height . "px";