我把慕課完整代碼復制過來　　還有自己對照手寫　都不行<?php $filename="./des_big.jpg";$src_image=imagecreatefromjpeg($filename);list($src_w,$src_h)=getimagesize($filename);$scale=0.5;$dst_w=ceil($src_w*$scale);$dst_h=ceil($src_h*$scale);$dst_image=imagecreatetruecolor($dst_w, $dst_h);imagecopyresampled($dst_image, $src_image,0,0,0,0, $dst_w, $dst_h, $src_w, $src_h);header("content-type:image/jpeg");imagejpeg($dst_image,"uploads/".$filename);imagedestroy($src_image);imagedestroy($dst_image);圖片路徑也是對的　就是ｔｅｓｔ下面