Question about mysql_query and function

[kevin7]

Hi!

 

I have a question, I saw from a tutorial, but i couldnt understand this,

what's the difference with the following:

 

mysql_query(some_query_string)

@mysql_query(some_query_string)

 

what does the alias mean?

 

and, i saw some of the functions in a class have something like this

 

function getPageNav($queryvars = '')

 

why do they assign $queryvars to nothing? in what situation we need to do this?

 

thanks!

[next]

'@' suppresses error/warning messages.

$queryvars's default value is blank, meaning that parameter doesn't have to be specified when you call the function.