catch

       catch() - catch an evaluation error

SYNOPSIS

       mixed catch( mixed expr );

DESCRIPTION

       Evaluate  <expr>.  If there is no error, 0 is returned. If
       there is a standard error, a string (with a  leading  '*')
       will be returned.

       The  function  throw()  can  also  be  used to immediately
       return any value, except 0. catch() is not really a  func-
       tion call, but a directive to the compiler.

       The  catch()  is  somewhat  costly, and should not be used
       just anywhere.  Rather, use it at places  where  an  error
       would destroy consistency.

SEE ALSO

       error(3), throw(3), error_handler(4)