PHP: fopen error handling

Question

I am extracting a file using

$fp = fopen('uploads/Team/img/'.$team_id.'.png', "rb"); $str = stream_get_contents($fp); fclose($fp); 

and then the method returns it as an image. But when fopen () fails because the file does not exist, it throws an error:

 [{"message":"Warning: fopen(uploads\/Team\/img\/1.png): failed to open stream: No such file or directory in C:\... 

This will return as json, obviously.

The question now is: how can I catch an error and prevent the method from throwing this error directly to the client?

Answer 1

You must first check for the existence of file_exists ().

  try { $fileName = 'uploads/Team/img/'.$team_id.'.png'; if ( !file_exists($fileName) ) { throw new Exception('File not found.'); } $fp = fopen($fileName, "rb"); if ( !$fp ) { throw new Exception('File open failed.'); } $str = stream_get_contents($fp); fclose($fp); // send success JSON } catch ( Exception $e ) { // send error message if you can } 

or a simple solution with no exceptions:

  $fileName = 'uploads/Team/img/'.$team_id.'.png'; if ( file_exists($fileName) && ($fp = fopen($fileName, "rb"))!==false ) { $str = stream_get_contents($fp); fclose($fp); // send success JSON } else { // send error message if you can } 

Answer 2

You can use the file_exists () function before calling fopen () .

 if(file_exists('uploads/Team/img/'.$team_id.'.png') { $fp = fopen('uploads/Team/img/'.$team_id.'.png', "rb"); $str = stream_get_contents($fp); fclose($fp); } 

Answer 3

 [{"message":"Warning: fopen(uploads\/Team\/img\/1.png): failed to open stream: No such file or directory in C:\... 

the error is clear: you put the wrong directory, you can try what you want, but it will not work. you can make it work with this:

• take the file and put it in the same folder of your php file (you can move it after you don’t worry, it’s about your mistake) or in the “above” folder of your script (just not outside your www folder)
• change fopen to ('./$team_id.'png',"rb");
• reload script file

do not forget: you cannot access the file located in your www folder (he did not find your file because he gave you his name: the name is taken from the $ team_id variable)