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leason
Smarty n00b
Joined: 09 Sep 2003
Posts: 2
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 Posted: Tue Sep 09, 2003 2:22 pm Post subject: Here's a function to sum the contents of an array column |
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I wrote this little function to show me totals for items and their costs. Here is the usage:
| Code: | | {sum_col array=$myArray col="myCol"} |
I am having a problem using modifiers with this function, however. I would like to be able to do this:
| Code: | | {sum_col array=$myArray col="myCol"|string_format:"%.2f"} |
But when I do it gives me a value of zero regardless of what it should be. Anyone know why this is happening?
Anyways, the function will return the sum of all the values of myCol in $myArray. Here is the function:
| Code: | <?PHP
/*********************
This is a smarty plugin that will sum the contents of a column in an array
*********************/
function smarty_function_sum_col($params, &$smarty){
if(!isset($params['array']) || !isset($params['col'])){
$smarty->trigger_error("sum_col: missing array or col value");
return;
}
$result = 0;
foreach($params['array'] as $row){
$result += $row[$params['col']];
}
return $result;
}
?> |
Hope you like it, this is my first function. I have only been using Smarty for about three hours now. |
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messju
Administrator
Joined: 16 Apr 2003
Posts: 3336
Location: Oldenburg, Germany
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| Posted: Fri Sep 12, 2003 3:36 pm Post subject: |
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i think zoran is right.
nevertheless:
your example {sum_col array=$myArray col="myCol"|string_format:"%.2f"}
applies the modifier to "myCol" (!).
if you want the modifier be applied to the plugins result do:
{sum_col|string_format:"%.2f" array=$myArray col="myCol"}
HTH
messju |
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leason
Smarty n00b
Joined: 09 Sep 2003
Posts: 2
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| Posted: Tue Sep 16, 2003 11:32 am Post subject: |
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I suppose that depends on what you consider programming logic and what you consider presentation logic. If the sum of a column of numbers is for display, and has no value to the program itself, then why not make it possible to do that in the template?
However, I see your point and it is valid. I have since writing that function switched to computing the sum in PHP and passing the value to the template. My problem at the time was that I did not understand some of the finer points of the smarty engine (and still don't  ).
Thanks for your replies. |
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