Which coding style you use for ternary operator?

$value = ( $a == $b )
            ? 'true value # 1'
            : ( $a == $c )
                ? 'true value # 2'
                : 'false value';

result = (foo == bar)  ? result1 :
           (foo == baz)  ? result2 :
           (foo == qux)  ? result3 :
           (foo == quux) ? result4 :
                           fail_result;

$value = ($a < 0) ? 'minus' : 'plus';

if else if else

$result = ($x == y)
        ? "foo"
        : "bar";

$myvar = ($x == $y)
?(($x == $z)?'both':'foo')
:(($x == $z)?'bar':'none');

$x = 1;
$y = 2;
$z = 3;
$myvar = ($x == $y)
       ? "foo"
       : ($x == $z)
         ? "bar"
         : "none";
$myvar == 'none'; // Good

$x = 1;
$y = 2;
$z = 1;
$myvar = ($x == $y) ? "foo" : ($x == $z) ? "bar" : "none";
$myvar == 'bar'; // Good

$x = 1;
$y = 1;
$z = 3;
$myvar = ($x == $y) ? "foo" : ($x == $z) ? "bar" : "none";
$myvar == 'bar'; // Bad!

$x = 1;
$y = 1;
$z = 1;
$myvar = ($x == $y) ? "foo" : ($x == $z) ? "bar" : "none";
$myvar == 'bar'; // Bad!

'before refactoring
If x = 0 Then                    ' If-Then-Else puts emphasis on flow control
    label = "None"
Else
    label = Foo.getLabel(x)      '  If-Then-Else forces repeat of assignment line
End If

'after refactoring
label = If(x = 0, "None", Foo.getLabel(x)) ' ternary If puts emphasis on assignment

$foo = (isset($bar)) ? $bar : 'default';

String var = (obj == null) ? "not set" : obj.toString();

String val; [...]
int var = (val == null) ? 0 : Integer.parseInt(val);