Description:
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Description:
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error_reporting() has synopsis

int error_reporting  ([ int $level  ] )

and can be called without any argument, but then it doesn't behave according to the description :
error_reporting ? Sets which PHP errors are reported
http://ca2.php.net/manual/en/function.error-reporting.php

Instead, the error reporting level is left unchanged when calling error_reporting() (no argument).

"Get the current error_reporting level, optionally changing it" 
might fix, but I'm sure there is a better modification to make 
things crystal-clear.

This was originally reported in #49872.