PHP image resizing to specific dimensions - php

Question

I have a simple form in which you select an image to upload to a folder. Literally only contains input type="file". My aim is to allow users to upload image files and then resize them to a specified height and width, whilst doing this sensibly, so the resize and or crop isn't the corner of a huge image.
That way the user does not have to worry about pre-formatting their image
I saw this function on the PHP documentation pages to resize images
/**
* Resize an image and keep the proportions
* #author Allison Beckwith <allison#planetargon.com>
* #param string $filename
* #param integer $max_width
* #param integer $max_height
* #return image
*/
function resizeImage($filename, $max_width, $max_height)
{
list($orig_width, $orig_height) = getimagesize($filename);
$width = $orig_width;
$height = $orig_height;
# taller
if ($height > $max_height) {
$width = ($max_height / $height) * $width;
$height = $max_height;
}
# wider
if ($width > $max_width) {
$height = ($max_width / $width) * $height;
$width = $max_width;
}
$image_p = imagecreatetruecolor($width, $height);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0,
$width, $height, $orig_width, $orig_height);
return $image_p;
}
Then I have this script below that moves an uncropped image to a folder
if(isset($_POST['submit']))
{
$test = is_writable("test");
echo "The directory 'test' returned $test";
echo "<br>";
echo "<br>";
$name = $_FILES['file']['name'];
$name = str_replace('..', '', $name);
$name = str_replace('/', '', $name);
$name = str_replace('\\', '', $name);
// Get file information and set paths
$type = $_FILES['file']['type'];
$size = $_FILES['file']['size'];
$tempname = $_FILES['file']['tmp_name'];
$imagePath = "images/";
$thumbPath = "images/thumbs/";
// Array of allowed types
$allowed_file_type = array(
"image/jpeg",
"image/jpg",
"image/gif",
"image/png"
);
if (!in_array($type, $allowed_file_type))
{
echo "Type is: $type";
echo "This file type is not allowed";
}
else if($size > 8000000)
{
echo "Files can only be up to 8MB";
}
else{
if(!is_dir($imagePath))
{
mkdir($imagePath, 0777, true);
}
if(!is_dir($thumbPath))
{
mkdir($thumbPath, 0777, true);
}
/* if(is_dir($imagePath)){
echo "$imagePath was created on the server";
echo "<br>";
echo "<br>";
}
else{
echo "$imagePath was not created on the server";
echo "<br>";
echo "<br>";
} */
if(move_uploaded_file($tempname, $imagePath.$name))
{
echo "Stored in: $imagePath$name";
$crop = resizeImage($name, 370, 370);
echo imagepng($crop);
}
else{
echo "Something went wrong";
}
}
}
Once the image has been moved could I use the crop function to crop the image I just uploaded, and then move that image to another folder?
$crop = resizeImage($name, 370, 370);
if(move_uploaded_file($crop, $thumbPath.$name))
{
}
else{
}
Essesentially I have an /images folder and inside this I have a /thumbs folder, just in case the user ever wants the original back for whatever reason.
I can provide more detailed code if necessary.
I may be barking up the wrong tree, so if there is a simpler or more straight-forward approach I'd be interested. I will obviously improve my question, given the most appropriate answer, so that it helps others.