I created a new function (getBirthday) in my file CatalogoArtisti.php to calculate age, depending on your birthday, I would like to hook this function in my template but i do not know how to do.
To be more clear in my template I have the birthday ($DateBirthDay) then I would pass this data to the function (getBirthday) to display in the template the calculation of the age.

==== Silverstripe version 2.4 ====

CatalogoArtisti.php
...........

getBirthday function ($birthday)
{
$ datetime1 = new DateTime ($ birthday);
$ datetime2 = new DateTime (date ('Y-m-d'));
$ diff = $ datetime1-> diff ($ datetime2);

return $ diff-> format ('% y');

CatalogoArtisti.ss
.............

<% Control Artista_Album%> <p> class = "arialBold"> $DateBirthDay </ p>

   / / I need the age?

<% End_control%>

Thank you all in advance for the help that you will give me
Have a nice day
MG

Hi Maga,

Try moving the getBirthday function to the class that your <% Control Artista_Album %> is looping through. In that class modify the getBirthday function like so.

getBirthday function () 
{ 
$birthday = $this->DateBirthDay; //assuming that DateBirthDay is a db field
$ datetime1 = new DateTime ($ birthday); 
$ datetime2 = new DateTime (date ('Y-m-d')); 
$ diff = $ datetime1-> diff ($ datetime2);

return $ diff-> format ('% y');

}

Then in your <% Control Artista_Album %> block, just replace $DateBirthDay with $Birthday

<% Control Artista_Album%> 

<p> class = "arialBold"> $Birthday</ p> 

<% End_control%>

HI YOTI,
thanks for your help but I tried to follow your directions but the template / html do not return any data?

For additional information:

The template catalogoartisti.ss is based on catalogoartisti.php,
into album.php there is the relationship with artista.php and i use the <% control Artista_Album%> to retrieve the field DataNascita (BirthDay)

The function that you suggested I inserted it in catalogoartisti.php and then I called from template catalogoartisti.ss

Artista.php
.....
class Artista extends DataObject {
public static $db = array(

"DataNascita" => "Date", //BirthDay

);

Album. php
......
class Album extends DataObject {

public static $has_one = array(
"Artista_Album" => "Artista"
);

catalogoartisti.php
.....

public function getBirthday()
{
$birthday = $this->DataNascita; // DataNascita (BirthDay ) is a db field
$datetime1 = new DateTime($birthday);
$datetime2 = new DateTime (date ('Y-m-d'));
$diff = $datetime1-> diff ($datetime2);
return $diff-> format ('%y');
}

CatalogoArtisti.ss
......
<% control Artista_Album %>
<p class="arialBold">$Birthday - sss </p>

Definitely something wrong I am a novice in programming.
I look forward to your help
thanks
greetings
MG

Hi maga,

Could you post up all the contents of your catalogoartisti.php?

Cheers,

Mo