Expressions And Operators: Error Control
@ suppresses any error messages generated by the evaluation of the expression that follows it. For example:
$infile = @fopen("NoSuchFile.txt", 'r');
On open failure, the value returned by
false, which is sufficient to know to handle the error. There is no need to
have any error message displayed.
If a custom error-handler has been established using the library function
set_error_handler that handler is still called.