``` /** * desription 壓縮圖片 * @param sting $imgsrc 圖片路徑 * @param string $imgdst 壓縮后保存路徑 */ private function compressedImage($imgsrc, $imgdst) { list($width, $height, $type) = getimagesize($imgsrc); $new_width = $width>800?800:$width;//圖片寬度的限制 $new_height =$height>800?ceil($height*800/$width):$height;//自適應匹配圖片高度 switch ($type) { case 1: $giftype = $this->check_gifcartoon($imgsrc); if ($giftype) { header('Content-Type:image/gif'); $image_wp = imagecreatetruecolor($new_width, $new_height); $image = imagecreatefromgif($imgsrc); imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); //90代表的是質量、壓縮圖片容量大小 imagejpeg($image_wp, $imgdst, 90); imagedestroy($image_wp); imagedestroy($image); } break; case 2: header('Content-Type:image/jpeg'); $image_wp = imagecreatetruecolor($new_width, $new_height); $image = imagecreatefromjpeg($imgsrc); imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); //90代表的是質量、壓縮圖片容量大小 imagejpeg($image_wp, $imgdst, 90); imagedestroy($image_wp); imagedestroy($image); break; case 3: header('Content-Type:image/png'); $image_wp = imagecreatetruecolor($new_width, $new_height); $image = imagecreatefrompng($imgsrc); imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); //90代表的是質量、壓縮圖片容量大小 imagejpeg($image_wp, $imgdst, 90); imagedestroy($image_wp); imagedestroy($image); break; } } /** * desription 判斷是否gif動畫 * @param sting image_file圖片路徑 * @return boolean t 是 f 否 */ private function check_gifcartoon($image_file){ $fp = fopen($image_file,'rb'); $image_head = fread($fp,1024); fclose($fp); return preg_match("/".chr(0x21).chr(0xff).chr(0x0b).'NETSCAPE2.0'."/",$image_head)?false:true; } ```