Validation de date

Bonjour,

J'utilise cette librairie http://codeigniter.com/wiki/FormDate/ pour générer des select (jours/mois/ annee)
mais je ne comprends pas la validation des dates

Comment appliquer une règle de validation simple d'autant que je genère pas mal de date fields sur le même formulaire.

voila mon controller

Code:

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$startdate1 = new FormDate();
$startdate1->config['prefix']="start_1_"; 
$startdate1->setLocale('nl_BE');
$startdate1->year['start'] = 2011;
$startdate1->year['end'] = 2015;
$startdate1->month['values'] = 'numbers'; 
$data['startdate1'] = $startdate1;
 
$enddate1 = new FormDate();
$enddate1->config['prefix']="end_1_";
$enddate1->setLocale('nl_BE');
$enddate1->year['start'] = 2011;
$enddate1->year['end'] = 2015;
$enddate1->month['values'] = 'numbers'; 
$data['enddate1'] = $enddate1;
 
$startdate2 = new FormDate();
$startdate2->config['prefix']="start_2_"; 
$startdate2->setLocale('nl_BE');
$startdate2->year['start'] = 2011;
$startdate2->year['end'] = 2015;
$startdate2->month['values'] = 'numbers'; 
$data['startdate2'] = $startdate2;
 
$enddate2 = new FormDate();
$enddate2->config['prefix']="end_2_";
$enddate2->setLocale('nl_BE');
$enddate2->year['start'] = 2011;
$enddate2->year['end'] = 2015;
$enddate2->month['values'] = 'numbers'; 
$data['enddate2'] = $enddate2;
 
$startdate3 = new FormDate();
$startdate3->config['prefix']="start_3_"; 
$startdate3->setLocale('nl_BE');
$startdate3->year['start'] = 2011;
$startdate3->year['end'] = 2015;
$startdate3->month['values'] = 'numbers'; 
$data['startdate3'] = $startdate3;
 
$enddate3 = new FormDate();
$enddate3->config['prefix']="end_3_";
$enddate3->setLocale('nl_BE');
$enddate3->year['start'] = 2011;
$enddate3->year['end'] = 2015;
$enddate3->month['values'] = 'numbers'; 
$data['enddate3'] = $enddate3;

et ma vue

Code:

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// SESSION 1
echo "<div id='session_1'>Form :&nbsp;";
echo $startdate1->selectDay();
echo $startdate1->selectMonth();
echo $startdate1->selectYear();
echo "&nbsp;To :&nbsp;";
echo $enddate1->selectDay();
echo $enddate1->selectMonth();
echo $enddate1->selectYear();
echo "</div>";
echo br();
// SESSION 2
echo "<div id='session_2'>Form :&nbsp;";
echo $startdate2->selectDay();
echo $startdate2->selectMonth();
echo $startdate2->selectYear();
echo "&nbsp;To :&nbsp;";
echo $enddate2->selectDay();
echo $enddate2->selectMonth();
echo $enddate2->selectYear();
echo "</div>";
echo br();
// SESSION 3
echo "<div id='session_3'>Form :&nbsp;";
echo $startdate3->selectDay();
echo $startdate3->selectMonth();
echo $startdate3->selectYear();
echo "&nbsp;To :&nbsp;";
echo $enddate3->selectDay();
echo $enddate3->selectMonth();
echo $enddate3->selectYear();
echo "</div>";
echo br();

merci d'avance