这个问题谁知道呢

Question

<?php 
$filename="des_big.jpg";
list($src_w,$src_h,$imagetype)=getimagesize($filename);
$mime=image_type_to_mime_type($imagetype);
//echo $mime;//image/jpeg,image/gif
$createFun=str_replace("/", "createfrom", $mime);
//imagejpeg()
$outFun=str_replace("/",null,$mime);
$src_image=$createFun($filename);
$dst_50_image=imagecreatetruecolor(50, 50);
$dst_220_image=imagecreatetruecolor(220, 220);
$dst_350_image=imagecreatetruecolor(350, 350);
$dst_800_image=imagecreatetruecolor(800, 800);
imagecopyresampled($dst_50_image, $src_image, 0,0,0,0, 50, 50, $src_w, $src_h);
imagecopyresampled($dst_220_image, $src_image, 0,0,0,0, 220, 220, $src_w, $src_h);
imagecopyresampled($dst_350_image, $src_image, 0,0,0,0, 350, 350, $src_w, $src_h);
imagecopyresampled($dst_800_image, $src_image, 0,0,0,0, 800, 800, $src_w, $src_h);
$outFun($dst_50_image,"uploads/image_50/".$filename);
$outFun($dst_220_image,"uploads/image_220/".$filename);
$outFun($dst_350_image,"uploads/image_350/".$filename);
$outFun($dst_800_image,"uploads/image_800/".$filename);
imagedestroy($src_image);
imagedestroy($dst_50_image);
imagedestroy($dst_220_image);
imagedestroy($dst_350_image);
imagedestroy($dst_800_image);

显示$outfun跟$createfun下面有红线提示错误

Answer 1

输出的文件夹不存在，把那几个文件目录创建出来先