Codice:
Codice PHP:
        /* -- Funzione ImageSwitch | Controlla il formato dell'Immagine -- */
        function ImageSwitch($src, $filetype)
        {
            switch ($filetype) 
            {
                case 'image/jpg':
                case 'image/jpeg':
                    $srcImg = imagecreatefromjpeg($src);
                    break;
                case 'image/png':
                    $srcImg = imagecreatefrompng($src);
                    break;
                case 'image/gif':
                    $srcImg = imagecreatefromgif($src);
                    break;
                case 'image/bmp':
                    $srcImg = imagecreatefrombmp($src);
                    break;
            }
            
            $dataImg = array();
            $dataImg['srcImg'] = $srcImg;
            $dataImg['origWidth'] = imagesx($srcImg);
            $dataImg['origHeight'] = imagesy($srcImg);
            return $dataImg;
        }

        /* -- Funzione CreateThumb | Crea una Miniatura Quadrata dell'Immagine e la Salva nella Cartella desiderata -- */
        function CreateThumb($filetype, $src, $thumbPath, $tDim, $tc) 
        { 
            $dataImg = ImageSwitch($src, $filetype);
            $origDim = min($dataImg['origWidth'] , $dataImg['origHeight']);
            $trimX = round(($dataImg['origWidth'] - $origDim)/2);
            $trimY = round(($dataImg['origHeight'] - $origDim)/2);
            $thumbImg = imagecreatetruecolor($tDim, $tDim);
            imagecopyresized($thumbImg, $dataImg['srcImg'], 0, 0, $trimX, $trimY, $tDim, $tDim, $origDim, $origDim);
            $resThumb = imagejpeg($thumbImg, $thumbPath, $tc);
            return $resThumb;
        } 
Errori:

Warning: imagesx(): supplied argument is not a valid Image resource in /home/name/public_html/upload.php on line 66

Warning: imagesy(): supplied argument is not a valid Image resource in /home/name/public_html/upload.php on line 67

Warning: imagecopyresized(): supplied argument is not a valid Image resource in /home/name/public_html/upload.php on line 79

Mi ritrovo con questi errori, ma che prima non mi erano mai apparsi, come mai?