YA: Upload Processing 20130607135748AAiqlu7

<?php

// In response to: http://answers.yahoo.com/question/index?qid=20130607135748AAiqlu7

function uploadErrorMsg($num, $debug=false){
    $msg = Array(
        1 => 'The uploaded file exceeds the Server\'s Maximum Allowable File Size',
        2 => 'The uploaded file exceeds the Form\'s Maximum Allowable File Size.',
        3 => 'The uploaded file was only partially uploaded, then interrupted or the connection was dropped.',
        4 => 'No file was uploaded.',
        6 => 'Missing a temporary folder. The server requires a temporary folder for file uploads.', // Internal Operations Error
        7 => 'Failed to write file to disk.', // Internal Server Error
        8 => 'A PHP extension stopped the file upload.' // PHP Extension Library stopped the upload.
    );
    return $msg[(int)$num];
}

if( isset($_FILES['file']) ){

    $f = $_FILES['file'];

    if( $f['error'] === UPLOAD_ERR_OK){ // UPLOAD_ERR_OK is a PHP Upload Constant
        $allowedExts = Array("jpg", "jpeg","gif","png");
        $allowedTypes = Array('image/jpeg','image/pjpeg','image/jpg','image/gif','image/png');
        $extension = pathinfo($f['name'], PATHINFO_EXTENSION);
        $newPath = 'upload/' . $f['name'];

        if( in_array($f['type'], $allowedTypes) && in_array($extension, $allowedExts)){

            echo "Upload: " . $f["name"] . "<br>";
            echo "Type: " . $f["type"] . "<br>";
            echo "Size: " . ($f["size"] / 1024) . " kB<br>";
            echo "Temp file: " . $f["tmp_name"] . "<br>";

            if( file_exists($newPath) ){
                echo $f['name'] . ' already exists.';
            }else if( move_uploaded_file( $f['tmp_name'], $newPath) ){
                echo $f['name'] . ' uploaded successfully to <b>' . $newPath . '</b>.<br />';
                echo '<img src="' . $newPath . '" style="max-width: 200px;" />';
            }
        }else{
            echo 'Invalid File';
        }
    }else{
        echo uploadErrorMsg($f['error']);
    }
}else{
    echo 'Nothing To Upload';
}