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Code to detect uploaded file type and uploaded image size in PHP_PHP Tutorial

WBOY
WBOYOriginal
2016-07-20 11:10:42979browse

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

The code is as follows
 代码如下 复制代码

 

//-----------------------------------------------------------------------------------


// 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 code

//----------------------------------------- ------------------------------------------------


// Function name: CheckExtendName($C_filename,$A_extend)// Function: Determine the extension of the uploaded file// Parameter: $C_filename Uploaded file name // $A_extend required extension // Return value: Boolean value // Remarks: None //---- -------------------------------------------------- --------------------------
function CheckExtendName( $C_filename,$A_extend){if(strlen(trim($C_filename)) < 5){return 0; / /Return 0 means no picture has been uploaded}$lastdot = strrpos($C_filename, "."); //Get the last appearing position$extended = substr($C_filename, $lastdot+1); //Get the extension for($i=0;$i{ if (trim(strtolower($extended)) == trim(strtolower($A_extend[$i]))) //Convert uppercase to lowercase and detect {$flag=1; //Add success flag$i=count($A_extend); //Stop detection if detected}} if($flag<>1){for($j=0;$j{ $alarm .= $A_extend[$j]." ";}AlertExit('Only '.$alarm.' files can be uploaded! And what you uploaded is a file of type '.$extended.');return -1; //Returning -1 means that the type of the uploaded image does not match } return 1; //Returning 1 means that the type of image meets the requirements } //----------------------------------------- ------------------------------------------ // Function name: CheckImageSize($ImageFileName,$LimitSize)// Function: Check the size of the uploaded image // Parameters: $ImageFileName Uploaded image name// $LimitSize Required size// Return value: Boolean value// Remarks: None //--------------------------------------------- ------------------------------------- function CheckImageSize($ImageFileName,$LimitSize){$size=GetImageSize($ImageFileName);if ($size[0] >$LimitSize[0] ││ $size[1]>$LimitSize[1]){AlertExit('Picture size is too large');return false;}return true;} //-------------------------------------------------- ------------------------------------ // Function name: Alert($C_alert,$I_goback=0)// Function: Illegal operation warning// Parameter: $C_alert (Error message prompted) // $I_goback (return to that page) // Return value: String // Remarks: None //--------------------------------------------- ------------------------------------- function Alert($C_alert,$I_goback=0){if($I_goback<>0){echo " ";}else{echo " ";} }?> http://www.bkjia.com/PHPjc/444713.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/444713.htmlTechArticleThe article has two examples that are used to detect the uploaded file type and uploaded image size. I originally wanted to write them separately but felt that It would be better to put the two together. Students in need should take a look. The code is as follows...
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