gd - php圖片旋轉問題

$fullFileName = $uploadImgDir."/".$filename;    $thumbFileName = $filename.".thumb";    if ($type =  pathinfo($fullFileName, PATHINFO_EXTENSION)) {        switch ($type) {            case 'jpg';            $isJpeg = true;            break;            case 'gif';            $isGif = true;            break;            case 'png';            $isPng = true;            break;            default:                return false;        }        // Load        if(isset($isGif) && $isGif){            $source = imagecreatefromgif($fullFileName);            $rotate = imagerotate($source, $degrees, 0);            imagegif($rotate,$fullFileName,100);            return true;        }elseif(isset($isJpeg) && $isJpeg){            $source = imagecreatefromjpeg($fullFileName);            $rotate = imagerotate($source, $degrees, 0);            imagejpeg($rotate,$fullFileName,100);            return true;        }elseif(isset($isPng) && $isPng){            //這個地方報錯了            **$source = imagecreatefrompng($fullFileName);            $rotate = imagerotate($source, $degrees, 0);            imagepng($rotate,$fullFileName,100);**            return true;        }else{            return false;        }

jgp的旋轉沒問題，png 報錯了
imagecreatefrompng(): gd-png: fatal libpng error: Read Error: truncated data
求解決
或者求png圖片旋轉的好方法

回複內容：

$fullFileName = $uploadImgDir."/".$filename;    $thumbFileName = $filename.".thumb";    if ($type =  pathinfo($fullFileName, PATHINFO_EXTENSION)) {        switch ($type) {            case 'jpg';            $isJpeg = true;            break;            case 'gif';            $isGif = true;            break;            case 'png';            $isPng = true;            break;            default:                return false;        }        // Load        if(isset($isGif) && $isGif){            $source = imagecreatefromgif($fullFileName);            $rotate = imagerotate($source, $degrees, 0);            imagegif($rotate,$fullFileName,100);            return true;        }elseif(isset($isJpeg) && $isJpeg){            $source = imagecreatefromjpeg($fullFileName);            $rotate = imagerotate($source, $degrees, 0);            imagejpeg($rotate,$fullFileName,100);            return true;        }elseif(isset($isPng) && $isPng){            //這個地方報錯了            **$source = imagecreatefrompng($fullFileName);            $rotate = imagerotate($source, $degrees, 0);            imagepng($rotate,$fullFileName,100);**            return true;        }else{            return false;        }

jgp的旋轉沒問題，png 報錯了
imagecreatefrompng(): gd-png: fatal libpng error: Read Error: truncated data
求解決
或者求png圖片旋轉的好方法

imagepng($rotate,$fullFileName,100);的問題
把第三個參數去掉就行了。不知道具體原因。
第三個參數是逼真度，png為什麼不能100%保真。

可以參考 OSC連結

路由規則可以根據自己需求重寫~~~~~~~~~~

