function checkDateFormat($date){
//match the format of the date
if (preg_match ("/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/", $date, $parts)){
//check weather the date is valid of not
if(checkdate($parts[2],$parts[3],$parts[1])){
return true;
}else{
return false;
}
}else{
return false;
}
}