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FEZ
Smarty Rookie
Joined: 21 Oct 2004
Posts: 6
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 Posted: Thu Oct 21, 2004 4:43 pm Post subject: assining 0 problem! |
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Just found something strange:
In my php I do
| Code: | | $smarty->assign("prev",0); |
And inside my template I have
| Code: |
{if $prev eq ""}
_nbsp;
{else}
<strong><< previous</strong>
{/if}
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which outputs "_nbsp;"
And this is wrong in my opinion...
FEZ
PS: had to use _nbsp; here as the right version won't work! |
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boots
Administrator
Joined: 16 Apr 2003
Posts: 5611
Location: Toronto, Canada
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| Posted: Thu Oct 21, 2004 5:03 pm Post subject: |
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Coincidentially, I just posted this on the mailing list yesterday. To summarize:
(Note that eq is implemented as ==)
| Quote: | keep-in-mind PHP's evaluations for $foo=0:
empty($foo) => true
$foo == '' => true
$foo === '' => false |
In other words, this is a quirk of PHP's typeless handling. What you probably want is:
| Code: | {if !$prev}
_nbsp;
{else}
<strong><< previous</strong>
{/if} |
It may be less confusing to use positive tests:
| Code: | {if $prev}
<strong><< previous</strong>
{else}
_nbsp;
{/if} |
The moral is that 0 should not be used as a signalling value. Use null for uninitalized defaults or perhaps the empty string (''). |
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FEZ
Smarty Rookie
Joined: 21 Oct 2004
Posts: 6
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| Posted: Thu Oct 21, 2004 5:11 pm Post subject: |
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Thanks for the fast reply!
But both you suggestions output _nbsp; in 2.6.5-dev
FEZ |
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boots
Administrator
Joined: 16 Apr 2003
Posts: 5611
Location: Toronto, Canada
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| Posted: Thu Oct 21, 2004 5:15 pm Post subject: |
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Sorry, I somehow thought that was desired 
Use:
| Code: | {if $prev === ""}
_nbsp;
{else}
<strong><< previous</strong>
{/if} |
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messju
Administrator
Joined: 16 Apr 2003
Posts: 3336
Location: Oldenburg, Germany
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| Posted: Thu Oct 21, 2004 5:16 pm Post subject: |
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| FEZ wrote: | | But both you suggestions output _nbsp; in 2.6.5-dev |
and that's correct because 0 is false.
you want to assign $smarty->assign("prev", "0"). |
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FEZ
Smarty Rookie
Joined: 21 Oct 2004
Posts: 6
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| Posted: Thu Oct 21, 2004 5:22 pm Post subject: |
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well in this case i comput something like ($currOffset-$itemsPerPage)
and this get's 0 in the second page (numerically)!
so it somehow shoud be different from ""....
what i need is:
if prev is NOT set ==> output "_npsp;"
else ==> output prev
and there is NO way to get this IF prev can be 0!!!!
FEZ |
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boots
Administrator
Joined: 16 Apr 2003
Posts: 5611
Location: Toronto, Canada
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| Posted: Thu Oct 21, 2004 5:33 pm Post subject: |
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Maybe you will like this: http://www.phpinsider.com/smarty-forum/viewtopic.php?t=3661
| Quote: | what i need is:
if prev is NOT set ==> output "_npsp;"
else ==> output prev
and there is NO way to get this IF prev can be 0!!!! |
What do you mean by "if prev is NOT set" ? If you are only interested in whether it is set or not try:
{if isset($prev)} or even {if $prev neq null}
and make sure that $prev defaults to null. Any other value will then be considered valid.
Still, {if $prev === ''} should work for you. |
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FEZ
Smarty Rookie
Joined: 21 Oct 2004
Posts: 6
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| Posted: Thu Oct 21, 2004 5:36 pm Post subject: |
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Okay!
Now it works (with {if !isset($prev)}_nbsp;{else}...{/if})
Thanks for you help!!
FEZ |
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