Clase para subir archivos al servidor.

[GatorV]

No entiendo realmente para que usar esa clase, se me hace más complicada que usar el array $_FILES junto con move_uploaded_file, es lo más sencillo, si quieres checar la extensión es trivial también, puedes usar una función así:

Código PHP:

class Upload
{
    private $destDir;
    private $checkExtensions;
    private $extensions;
    private $errors = array();
    private $upload_errors = array(
        UPLOAD_ERR_INI_SIZE    => "Larger than upload_max_filesize.",
        UPLOAD_ERR_FORM_SIZE    => "Larger than form MAX_FILE_SIZE.",
        UPLOAD_ERR_PARTIAL    => "Partial upload.",
        UPLOAD_ERR_NO_FILE        => "No file.",
        UPLOAD_ERR_NO_TMP_DIR    => "No temporary directory.",
        UPLOAD_ERR_CANT_WRITE    => "Can't write to disk.",
        UPLOAD_ERR_EXTENSION     => "File upload stopped by extension.",
        UPLOAD_ERR_EMPTY        => "File is empty." // add this to avoid an offset
    );
    
    public function __construct($destDir, $checkExt = false, array $extensions = array())
    {
        $this->destDir = $destDir;
        $this->checkExtensions = $checkExt;
        $this->extensions = $extensions;
    }
    
    public function setExtensions(array $extensions)
    {
        $this->extensions = $extensions;
        
        return $this;
    }
    
    public function getExtensions()
    {
        return $this->extensions;
    }
    
    public function setCheckExtensions($checkExt = true)
    {
        $this->checkExtensions = $checkExt;
        
        return $this;
    }
    
    public function getCheckExtensions()
    {
        return $this->checkExtensions;
    }
    
    public function getErrorsFor($name)
    {
        return $this->errors[$name];
    }
    
    public function getErrors()
    {
        return $this->errors;
    }
    
    public function addError($name, $error) {
        if (!isset($this->errors[$name])) $this->errors[$name] = array();
        
        $this->errors[$name][] = $error;
        
        return $this;
    }
    
    public function moveFile($name)
    {
        if (!$this->isValid($name)) {
            return false;
        }
        
        if (!move_uploaded_file($_FILES[$name]['tmp_name'], $destDir)) {
            throw new RuntimeException("can't move file to destination dir: {$destDir}");
        }
        
        return true;
    }
    
    public function getName($name)
    {
        if (!$this->isValid($name)) {
            return false;
        }
        
        return $_FILES[$name]['name'];
    }
    
    public function getExtension($name)
    {
        if (!$this->isValid($name)) {
            return false;
        }
        
        $fileInfo = pathinfo($_FILES[$name]['name']);
        $ext = strtolower($fileInfo['extension']);
        
        return $ext;
    }
    
    private function isValid($name)
    {
        if (!isset($_FILES[$name])) {
            $this->addError($name, "missing in \$_FILES");
            return false;
        }
    
        if ($_FILES[$name]['error'] != UPLOAD_ERR_OK) {
            $translated = $this->translateUploadError($_FILES[$name]['error']);
            $this->addError($name, $translated);
            return false;
        }
    
        if (!is_uploaded_file($_FILES[$name]['tmp_name'])) {
            $this->addError($name, 'file wasn\'t uploaded by POST, possible attack');
            return false;
        }
    
        if ($checkExt) {
            $ext = $this->getExtension($name);
        
            if (!in_array($ext, $this->extensions)) {
                $this->addError($name, "invalid extension: {$ext}");
                return false;
            }
        }
        
        return true;
    }
    
    private function translateUploadError($error)
    {
        return $this->upload_errors[$error];
    }
}
 

Uso:

Código PHP:

$upload = new Upload('./uploads/', true, array('jpg', 'gif'));
if ($upload->moveFile('file')) {
    $name = $upload->getName('file');
    echo "{$name} uploaded correctly";
} else {
    foreach ($upload->getErrorsFor('file') as $error) {
        echo $error;
    }
}