How can I allow other image formats to be uploaded - php

Question

This is the code that uploads users logo's I was wondering if anyone could help me.
I want to be able to allow users to upload .png and .gif files too.
Sorry if this is a simple fix but I am very new to php.
<?
//edit logo
function resize_image ($image) {
$imgsize = getimagesize($image);
//check for gallery type to determine thumbnail size
$size_x = 150;
$ratio = 150 / $imgsize[0];
$size_y = $imgsize[1] * $ratio;
$srcimage = ImageCreateFromjpeg ($image);
$newimage = ImageCreateTrueColor($size_x,$size_y);
//$newimage = imagecreate ($size_x, $size_y);
imagecopyresized ($newimage, $srcimage, 0, 0, 0, 0, $size_x, $size_y,
imagesx($srcimage), imagesy($srcimage));
return $newimage;
}
$myrepairer = new repairer;
//resize and upload image
$file = $_FILES['logo']['tmp_name'];
$file_name = $_FILES['logo']['name'];
//upload the image followed by a db update.
if ($file != 'none') {
if (copy($file,'logos/'.$_REQUEST['id'].'.jpg')) {
unlink($file);
}
$myrepairer->updatelogo($_REQUEST['id'],$_REQUEST['id']);
$thumbnail = resize_image('logos/'.$_REQUEST['id'].'.jpg');
unlink('logos/'.$_REQUEST['id'].'.jpg');
ImageJPEG($thumbnail,'logos/'.$_REQUEST['id'].'.jpg');
}
$resultmessage = '<div align="center" class="GreenText">Logo Updated</div>';

Answer 1

You can just get the file extension and use it instead of '.jpg'.
$ext = pathinfo($_FILES['logo']['name'], PATHINFO_EXTENSION);
So, it'll be something like:
$ext = pathinfo($_FILES['logo']['name'], PATHINFO_EXTENSION);
//upload the image followed by a db update.
if ($file != 'none') {
if (copy($file,'logos/'.$_REQUEST['id'].'.'.$ext)) {
unlink($file);
}
$myrepairer->updatelogo($_REQUEST['id'],$_REQUEST['id']);
$thumbnail = resize_image('logos/'.$_REQUEST['id'].'.'.$ext);
unlink('logos/'.$_REQUEST['id'].'.'.$ext);
ImageJPEG($thumbnail,'logos/'.$_REQUEST['id'].'.'.$ext);