PHP File Download error

PHP File Download error
Wrote a file to download the program

PHP Code

  function Download_file ($filename) {//below to provide the download if (file_exists ($filename)) {                    $file = fopen ($filename);                    Header (' Content-description:file Transfer ');                    Header (' Content-type:application/octet-stream ');                    Header (' content-disposition:attachment; Filename= '. basename ($filename));                    Header (' content-transfer-encoding:binary ');                    Header (' expires:0 ');                    Header (' cache-control:must-revalidate ');                    Header (' Pragma:public '); Header (' Content-length: '. FileSize ($filename).                    ' bytes ');                    Ob_clean ();                    Flush ();                    ReadFile ($filename);                    Fclose ($file);                return true;                    }else{echo ("The File not exist");                return false;}//above to provide the download} 

However, there is no feature to download. The file has been generated in the previous step. But if I change the return to True to exit the download function can be implemented, but after the file download I also have to do other functions. Ask the gods, what's going on? I see the download example on the Internet is not to say that we need to exit.


------Solution--------------------
See where you call this function, check where it is called, where is there a problem?
------Solution--------------------
Here's the thing:

PHP code

if (Download_file ($filename)) {#下面的操作}else{#错误提示} 
------Solution--------------------
 
    
     discussion  
    
 wrote a file download program PHP code 
    
 Function Dow Nload_file ($filename) {
    
//below to provide the download 
    
 if (file_exists ($filename))
   {
    
 
    
 $file ...
   
    
 
    
------Solution--------------------
 
    
     discussion  
    
 
    
 Reference: 
    

   
    
 this: 
    
 PHP code 
    
 
    
 if (Download_file ($filename)) {
    
 #下面的操作 
    
}else{
    
 #错误提示 
    
} 
    
 
    
 
    
 
    
 I don't know what you're talking about. Do you want to omit the return? Return omitted I can't run 
    
 
    
------Solution--------------------
 Your function return false is equivalent to Preventdefault not submitting the form 
 When a reply is satisfied, such as checking that the field is non-empty and then return true; The page does not jump until it calls your action 
 This is the form submission common blocking exception submission method 
 