Code to detect uploaded file type and uploaded image size in PHP

高洛峰
Release: 2016-11-29 10:11:14
Original
1020 people have browsed it

There are two examples in the article that are used to detect uploaded file types and uploaded image sizes. I originally wanted to write them separately but thought it would be better to put them together. Students in need can take a look.

// 函数名:CheckExtendName($C_filename,$A_extend)
// 作 用:上传文件的扩展名判断
// 参 数:$C_filename 上传的文件名
// $A_extend 要求的扩展名
// 返回值:布尔值
// 备 注:无
//-----------------------------------------------------------------------------------
  
  
function CheckExtendName($C_filename,$A_extend)
{
if(strlen(trim($C_filename)) < 5)
{
return 0; //返回0表示没上传图片
}
$lastdot = strrpos($C_filename, "."); //取出.最后出现的位置
$extended = substr($C_filename, $lastdot+1); //取出扩展名
  
  
for($i=0;$i{
if (trim(strtolower($extended)) == trim(strtolower($A_extend[$i]))) //转换大
小写并检测
{
$flag=1; //加成功标志
$i=count($A_extend); //检测到了便停止检测
}
}
  
  
if($flag<>1)
{
for($j=0;$j{
$alarm .= $A_extend[$j]." ";
}
AlertExit('只能上传'.$alarm.'文件!而你上传的是'.$extended.'类型的文件');
return -1; //返回-1表示上传图片的类型不符
}
  
  
return 1; //返回1表示图片的类型符合要求
}
  
  
  
//-----------------------------------------------------------------------------------
  
  
  
// 函数名:CheckImageSize($ImageFileName,$LimitSize)
// 作 用:检验上传图片的大小
// 参 数:$ImageFileName 上传的图片名
// $LimitSize 要求的尺寸
// 返回值:布尔值
// 备 注:无
//-----------------------------------------------------------------------------------
  
  
function CheckImageSize($ImageFileName,$LimitSize)
{
$size=GetImageSize($ImageFileName);
if ($size[0]>$LimitSize[0] ││ $size[1]>$LimitSize[1])
{
AlertExit('图片尺寸过大');
return false;
}
return true;
}
  
  
  
//-----------------------------------------------------------------------------------
  
  
  
// 函数名:Alert($C_alert,$I_goback=0)
// 作 用:非法操作警告
// 参 数:$C_alert(提示的错误信息)
// $I_goback(返回到那一页)
// 返回值:字符串
// 备 注:无
//-----------------------------------------------------------------------------------
  
  
function Alert($C_alert,$I_goback=0)
{
if($I_goback<>0)
{
echo " ";
}
else
{
echo " ";
}
}
?>
Copy after login


Related labels:
php
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!