Question

I am following good programming practices and I am logging the PHP errors to file instead of displaying it to user. I use set_error_handler() for that.

Now the problem. For example, I have somewhere:

@file_exists('/some/file/that/is/outside/openbasedir.txt');

But despite the error suppression operator, the error message logs. I don’t want that. I want suppressed errors not to pass to my error handler.

Answer 1

This answer applies at PHP 7:

The @ operator temporarily sets error_reporting to 0, so you can test the value of error_reporting in your error handler:

if (error_reporting() == 0)
    return;

Or even better, log only error types that are in error_reporting:

$error_reporting = error_reporting();
if ( !($error_reporting & $errno) )
    return;

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Also take a look at the log_errors and error_log options, for automatically logging errors to a file or to syslog.