My first class - am I on the right road?

[Martha_Biggly]

Hi, I have just started OOP style programming and have made my first class. Could you be kind enough to have a look and see if I am using the right 'philosophy'? I have been doing procedural style for ages and it is difficult thinking in a different way.

the code works perfectly well but it is the 'philosophy' behind it that I am unsure about. Have I gone about it the right way? Is my approach completely off the wall?

The class it self explanatory and simply takes an uploaded file and a name. As it goes through the verifyImage function, it will exit if there is an error. If no error then it carries on.

I have called it this way in my main page:

require_once('newImage.php');

$image = new newImage($_FILES['image']['size'], $_FILES['image']['type'], $_FILES['image']['tmp_name'], $_POST['name']);

if ($image->verifyImage()) {
    $image->moveImage();
}

The class is as follows:

class NewImage {

private $size;
private $type;
private $oldName;
private $newName;

function __construct($size, $type, $oldName, $newName) {
    $this->size = $size / 1000;
    $this->type = $type;
    $this->oldName = $oldName;
    $this->newName = trim(stripslashes(strip_tags($newName)));
} // end function __construct


function verifyImage() {

    // Check for blank upload.
    try {
        if ($this->size == 0){
            throw new exception ("<p>You forgot to upload an image.</p>");
        }
    } catch (exception $error) {
        echo $error->getmessage();
        return;
    }

    // Ensure upload is a valid mime type.
    $mimeTypes = array ("image/jpeg","image/pjpeg");
    try {
        if (!in_array ($this->type,$mimeTypes)){
            throw new exception ("<p>The image must be a jpg.  Yours is an: " . $this->type . "</p>");
        }
    } catch (exception $error) {
        echo $error->getmessage ();
        return;
    }

    // Check for the file size.
    try {
        if ($this->size > 90) {
            //Echo an error message.
            throw new exception ("The file is too big at " . $this->size . "KB");
        }
    } catch (exception $error) {
        echo $error->getmessage();
        return;
    }

    // Check for a blank newName.
    try {
        if ($this->newName == '') {
            throw new exception ("<p>You forgot to enter a name for the image.</p>");
        }
    } catch (exception $error) {
        echo $error->getmessage();
        return;
    }

    // Convert spaces to underscores in the image newName
    try {
        if (!$this->newName = preg_replace('/ /', '_', $this->newName)) {
            throw new exception ("<p>There was an error converting the image name</p>");
        }
    } catch (exception $error) {
        echo $error->getmessage();
        return;
    }

return true;

} // end function verifyImage()


function moveImage() {

    //move image with the newName.
    try {
        if (!move_uploaded_file ($this->oldName,"uploads/". $this->newName.".jpg")) {
            throw new exception ("There was an error moving the file.");
        }
    } catch (exception $error) {
        echo $error->getmessage ();
        return;
    }

return true;

} // end function moveImage

}  // end class NewImage

Just because it works does not mean it is the best way to go about it so any thoughts gratefully appreciated!