try catch error

[purencool]

hi php lovers

 

I have been trying  try catch but, I can't get it to work. The code opens a non existing file called "a"

 

private function fileOpenMethod($filePath, $numberOfLines,$header,$replaceHeader){
       try{
        $file = file( $filePath);
       }catch(file $e){
           $e= "the flie path does not work"; //. $e->getMessage();
       }

return $e;
}

I am getting an error message on the  page but not the one that am trying to generate

Warning: file(a) [function.file]: failed to open stream: No such file or directory in /home/public_html/_Doc/StripFileClass.php on line 15

 

I am sure it is simple but I am new to try and catch and it is a learning curve blah blah blah.

Can anyone see what I am doing wrong =)

[Daniel0]

file() doesn't throw exceptions.

[purencool]

Thanks for the reply

 

Your answer as create a couple of questions

1.I know that i can suppress the error using @ is there a way to force the error into a variable at all?

2.Is try and catch only  going to work on my code not the functions called inside the code I write?

 

 

[Daniel0]

1.I know that i can suppress the error using @ is there a way to force the error into a variable at all?

 

If you turn on track_errors in php.ini you can get the last error/warning that is generated in $php_errmsg. I don't think it'll work if you suppress the error though. Generally speaking, you shouldn't suppress errors, however.

 

2.Is try and catch only  going to work on my code not the functions called inside the code I write?

 

A try-catch block works by transferring control to the catch block if a designated exception is thrown within the try block. If no exception occurs, the catch block will not be executed.

 

An error is not the same as an exception.

[purencool]

Thank you

 

That explains why it won't work=).

 

purencool

[Andy-H]

private function fileOpenMethod($filePath, $numberOfLines, $header, $replaceHeader)
{
    try
    {
        $file = file($filePath);
        if ($file === false || empty($file))
            throw new exception("The file path is invalid or doesn't exist.\n");
    }
    catch(Exception $e)
    {
        return $e->getMessage();
    }

return $file;
}

 

file try exception

[Daniel0]

Though you shouldn't return an error message from a function call. Instead you should throw an exception or generate an error using trigger_error (exceptions would be preferred).