If you want to hide your images source from visiters, you can do such thing:

showimage.PHP file

<?PHP
    Header("Content-type: image/jpeg");
    $exp=GMDate("D, d M Y H:i:s",time()+999);
    Header("Expires: $exp GMT");
   
    $file=$image_path . $_GET["img"]; // getting image name and your image path
    if (file_exists($file)){
    $info=getimagesize($file);
    $width=$info[0];
    $height=$info[1];
    if ($info[2]==1){
        $img=@imagecreatefromgif($file);
    } else if ($info[2]==2){
        $img=@imagecreatefromjpeg($file);
    } else if ($info[2]==3){
        $img=@imagecreatefrompng($file);
    } else {
        $width=640;
        $height=480;
        $file = 'noimage.png'; // if there is not such image, it will show default image
        $img=@imagecreatefrompng($file);
    }
   
    ImageJpeg($img);
    imagedestroy($img);
?>

Dont forget that, you need to have GD supported server to be able to use this PHP feature. For it, talk to your server tech.

$image_path variable should contain your image path and you will send your image name which you want to show.

in HTML file

<img src="showimage.PHP?img=tst.jpg">

as you see we use img HTML tag and at source code, we call our PHP file with image name we want to show.