Hahaha! Actually this is my first time coding, so I still adapting the
correct way to do it.
FYI, for the sake of minimizing the coding and viewing space occupied of the
code, I even replace the switch block with array if the cases are just
merely selecting pool of variables/categories/parameters!
I'm still learning the best practice for coding. :-)
""Daevid Vincent"" <daevid@xxxxxxxxxx> wrote in message
news:FEF58898DC3544E3872458CD64661A02@xxxxxxxxxxxxxx
Whoa! I didn't even know you could use a switch statement like that. In 20
years of coding, I've never ever used a switch like that first "if/else"
style. PHP never ceases to amaze me in it's flexibility (and ability to
shoot yourself in the foot ;-p )
And remember, all your base are belong to Adam.
-----Original Message-----
From: Adam Randall [mailto:randalla@xxxxxxxxx]
Sent: Thursday, August 20, 2009 11:20 PM
To: Keith
Cc: php-general@xxxxxxxxxxxxx
Subject: Re: Is there limitation for switch case:
argument's value?
I've never understood why people use switch statements like this as in
reality you are using it more like an if/else block, but anyway.
The reason why your code is not working is that you are passing into
the switch the value of 0, or false, which means that when any of
those $sum == N conditionals comes up as false (say $sum == 8 ), then
that is what is returned because they match up. In PHP's eyes, 0 ==
false in switch statements.
To fix your code, change the switch( $sum ) to switch( true ):
switch( true )
{
case ($sum == 8):
echo "sum=8\n";
break;
case ($sum == 7 || $sum == 6):
echo "sum=7 or 6\n";
break;
case ($sum == 2 || $sum == 1):
echo "sum=2 or 1\n";
break;
case ($sum == 0):
echo "sum=0\n";
break;
default:
echo "sum=3/4/5\n";
break;
}
Or, write your switch like this:
switch( $sum )
{
case 8:
echo "sum=8\n";
break;
case 6:
case 7:
echo "sum=7 or 6\n";
break;
case 1:
case 2:
echo "sum=2 or 1\n";
break;
case 0:
echo "sum=0\n";
break;
default:
echo "sum=3/4/5\n";
break;
}
Regards,
Adam.
On Thu, Aug 20, 2009 at 8:40 PM,
Keith<survivor_bus@xxxxxxxxxxx> wrote:
> Hi,
> I encounter a funny limitation here with switch case as below:
> The value for $sum is worked as expected for 1 to 8, but not for 0.
> When the $sum=0, the first case will be return, which is "sum=8".
> Is there any limitation / rules for switch case? Thanks for advice!
>
> Keith
>
> $sum=0;
> switch($sum)
> {
> case ($sum==8):
> echo "sum=8";
> break;
> case ($sum==7 || $sum==6):
> echo "sum=7 or 6";
> break;
> case ($sum==2 || $sum==1):
> echo "sum=2 or 1";
> break;
> case 0:
> echo "sum=0";
> break;
> default:
> echo "sum=3/4/5";
> break;
> }
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>
--
Adam Randall
http://www.xaren.net
AIM: blitz574
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