实现文件上传不超过2m的图片_file.size图片大小不能超过2m csdn-优快云博客

本文链接：https://blog.youkuaiyun.com/zhaohehe123/article/details/8293275

file_upload.php

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>处理上传文件</title>
</head>

<body>
<?php

if ($_FILES["file"]["error"]>0){
echo "上传文件失败！";
}

else
print_r($_FILES);
{

  if($_FILES["file"]["type"]!='image/jpeg' && $_FILES["file"]["type"]!='image/pjpeg'){
   echo "<script>alert('图片格式不正确！请重新上传！');history.back();</script>";
      }

  else {
   if($_FILES["file"]["size"]>20){
   echo "<script>alert('文件太大！请重新上传！');history.back();</script>";
   }
  }
  if(move_uploaded_file($_FILES["file"]["tmp_name"],"d:/wamp/tmp/".date("d-m-y",time()).$_FILES["file"]["name"])){
echo "文件上传成功！";
}
}

?>
</body>
</html>

form.php

<body>
点击浏览按钮添加要上传的文件(*请上传大小不能大于2M的jpg图片)<br />
<form enctype="multipart/form-data" action="file_upload1.php" method="post">
<input type="file" name="file" /><br />

</form>
</body>
</html>