If $doterms is previously set using a logic expression
($doterms = (x and y and z and ...)) it should contain the
integer equivalent of boolean TRUE or FALSE - so far so good.

In an assignment context:

  $doterms = $doterms and ereg(...) and eregi(...);

$doterms should only be set to the integer equivalent of
boolean TRUE iff all three expressions are considered to
be "TRUE" - alas, however, it appears to *always* be set
to true, regardless of the ereg/eregi pattern matches.

A conditional context does, however work:

  if( $doterms and ereg(...) and eregi(...) )
    $doterms = 1;
  else
    $doterms = 0;

This will correctly set $doterms to zero (FALSE) should one
of the RE pattern matches fail.

Surely this is inconsistent (boolean/logic) behaviour (and
probably affects other/all functions)?