calc element with empty values

[vipzeus]

in my form i have a calc element where at begin my fields are empty and calc element does not work as well.

//Consumi
$consumi_f0 = '{simulatore___consumo_f0}';
$consumi_f1 = '{simulatore___consumi_f1}';
$consumi_f2 = '{simulatore___consumi_f2}';
$consumi_f3 = '{simulatore___consumi_f3}';
//Chiama il costo
$ccv = {simulatore};

return($ccv_label . ' : ' . $ccv .'  ' .'Euro'.' </br> '. $kh_f0_label. ' : ' .$spesa_bio).'  ' .'Euro';

how i can use a validation if elements of dependi for calculation are empty ?

 

[troester]

Depending on what you want something like

if ($spesa_bio > 0 ) return your-long string
else return-something-else

https://www.w3schools.com/php/php_if_else.asp

 

[vipzeus]

Yes but i dont know how do with the right syntax

$function = {table___cascading_element}; (but its empty at begin because depend by other cascading or dbj

i tried

if ($function >0 ) {echo $function} not work

if ($function !=empty) echo $function } but not work

In fron end i have errors

 

[troester]

A calc element needs to
return something (as you've done in your first post)

 

[vipzeus]

My problemi is if im working in the exist rows where data is not empty , my form work but when go to add a new record ihave errors.
This because in my cdd are empty and my script does not work .
is it way to calc only if casading elements are not empty?

 

[troester]

It would be useful if you post the errors.

is it way to calc only if casading elements are not empty?

Sure, use if (...)

$ccv = {simulatore};
or
$function = {table___cascading_element};

This is no valid php, it must be a variable or a string (something with '' or "").
If it should be an element placeholder something like
'{table___element}'

 

[vipzeus]

the error is
0 syntax error, unexpected token ";" with broken page.

$consumi_f0 = '{simulatore___consumo_f0}';
//Chiama il costo amministrativo
$ccv = {simulatore___costo_ccv_offerta_al_mese};

}

The code above is what i have now and work if edit a row with exist records.
If add new record ' i m obtain the error above

 

[troester]

$ccv = {simulatore___costo_ccv_offerta_al_mese};

 

[vipzeus]

I can' t beleave it! Its 3 days was looking for the problem for 2 simple quotes

Thank you Troester

 

[hominid4]

On a side note, when I'm doing calculations I usually have default fallback values, especially when they start out empty.

$consumi_f0 = '{simulatore___consumo_f0}' > 0 ? '{simulatore___consumo_f0}' : 0;
$consumi_f0 = !empty('{simulatore___consumo_f0}') ? '{simulatore___consumo_f0}' : 0;
Or whichever appropriate/preferred condition check and appropriate/preferred fallback value technique...

 

[vipzeus]

Thank you hominid4
Very useful note