[PHP] php没有文件被上传的实例分析及解决办法

upload_max_filesize = 300M
post_max_size = 300M

php_value upload_max_filesize "300M"
php_value post_max_size "300M"

$error=$myfile['myfile']['error'];
  if ($error==0){//为0，代表上传成功
  if (move_uploaded_file($tmp,"userpic/".$picname)) {
    echo "移动文件成功";
  }else{
    echo "移动文件失败";
  }
  }else{//不为0，匹配错误信息
  switch ($error){
    case 1:
    echo "超过文件最大上传限制";//php.ini中upload_max_filesize
    break;
    case 2:
    echo "超过表单文件大小限制";//HTML表单中MAX_FILE_SIZE选项
    break;
    case 3:
    echo "文件部分被上传";
    break;
    case 4:
    echo "未选择上传文件";
    break;
    case 7://文件写入失败
    case 8:
    echo "系统错误";
    break;
  }
  }

<!--表单隐藏域对上传大小进行限制-->
<input type="hidden" name="MAX_FILE_SIZE" value="2097152">
<!--accept 对文件类型限制-->
<input type="file" name="myfile" accept="image/jpeg,image/png">

$size=$myfile['size'];//获取文件大小
$MaxSize=2097152;//设置最大允许字节
$type=$myfile['type'];//获取图片类型
$AllowTypr=array('image/jpeg','image/png','image/gif');//允许类型数组
if ($error==0){//为0，代表上传成功
  if ($size>$MaxSize){
  echo "<script>alert('文件大小超过限制');</script>";
  echo "<script>history.back(1);</script>";
  exit();
  }
  if (!in_array($type,$AllowTypr)){
  echo "<script>alert('请上传正确图片类型');</script>";
  echo "<script>history.back(1);</script>";
  exit();
  }