Resize Width and Height of an Image During Upload : <p>I have an upload script that renames and uploads .png files to directory of my website. I want the script to be able to scale the image down to 256x256 pixels during the upload process.</p>

<p>I was looking around here and I can't figure out how to include it in the code I already have.</p>

<pre><code>&lt;?php
$z = $_POST['z'];
$x = $_POST['x'];
$y = $_POST['y'];
$target_dir = "/DIRECTORY/$z-$x-$y.png";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = strtolower(pathinfo($target_file,PATHINFO_EXTENSION));
// Check if image file is a actual image or fake image
 if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {
        echo "File is an image - " . $check["mime"] . ".";
        $uploadOk = 1;
    } else {
        echo "File is not an image.";
        $uploadOk = 0;
    }
}
// Check if file already exists
if (file_exists($target_file)) {
    echo "Sorry, file already exists.";
    $uploadOk = 0;
}
// Check file size
if ($_FILES["fileToUpload"]["size"] &gt; 500000) {
    echo "Sorry, your file is too large.";
    $uploadOk = 0;
}
// Allow certain file formats
if($imageFileType != "png") {
    echo "Sorry, only PNG files are allowed.";
    $uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
echo "Sorry, your file was not uploaded.";
// if everything is ok, rename then try to upload file
} else { 
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], 
$target_dir)) {
        echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " 
has been uploaded.";
        echo '&lt;a href="mywebsite"&gt;To The Drawbox! 
   &lt;/a&gt;';

    } else {
        echo "Sorry, there was an error uploading your file.";
    }
}
?&gt;
</code></pre>

<p>So far it only renames the files but does not resize.</p>
