php：按时间顺序排序表示日期的字符串数组

how could i convert this exemple of string values array:

$taba=array('12/04/12','13/05/13','03/01/12');

to date type values, sort these dates chronogically before returning them as strings in a select option HTML input ?

$taba=array('12/04/12','13/05/13','03/01/12');
function todate($date){
     // as Legionar comment your date format is wrong .. can't guess which is date, which is year..
     // if year is the last numbers you must change the return to ..
     // return strtotime(implode("-",array_reverse(explode("/",$date))));
     return strtotime(str_replace("/","-",$date));
}

$map = array_map('todate', $taba);
sort($map);
echo "<select>";
foreach($map as $key=>$value) {
    echo '<option>'.date("Y-m-d H:i:s", $value)."</option>";
}
echo "</select>";

Sorry I missed the sort point. Here is with sorting :) You can generate the wished date format at the foreach date function..

Here you are (sorted from past to the future):

$taba=array('12/04/12','13/05/13','03/01/12');
$tabb=array();

foreach ($taba as $key => $val) {
    $d = explode('/', $val);

    $tabb[$key] = $d[2].'-'.$d[1].'-'.$d[0];
}

asort($tabb);

echo '<select>';
    foreach ($tabb as $key => $val) {
        echo '<option value="'.$val.'">'.$taba[$key].'</option>';
    }
echo '</select>';

As variant, you can use strtotime() for converting each element to timestamp, than sort how you need and transform back before output. Example:

$taba=array('12/04/12','13/05/13','03/01/12');
usort($taba, function($a, $b){
    $ta = strtotime(str_replace('/', '-', $a));
    $tb = strtotime(str_replace('/', '-', $b));
    if ($ta == $tb) {
        return 0;
    }
    return ($ta < $tb) ? -1 : 1;
});
print_r($taba);

You can use array_map to get a timestamp for each input date, then array_multisort to reorder the dates based on the sorted order of the corresponding timestamps:

$taba=array('12/04/12','13/05/13','03/01/12');
$timestamps = array_map(function($d) {
    return DateTime::createFromFormat('d/m/y', $d)->getTimestamp(); }, $taba);
array_multisort($timestamps, $taba);

print_r($taba);

See it in action.

If you're not worried about invalid dates and all dates have a consistent format, might I suggest you use usort with a custom compare function that sorts the dates however you wish e.g.:

function cmp($a, $b) {
  $year = strcmp(substr($a, -2), substr($b, -2));
  if ($year == 0) {
    // years are the same, try month
    $month = strcmp(substr($a, 3, 2), substr($b, 3, 2));
    if ($month == 0) {
      return strcmp(substr($a, 0, 2), substr($b, 3, 2));
    }
    return $month;
  }
  return $year;
}

$taba=array('12/04/12','13/05/13','03/01/12');

usort(
    $taba,
    function ($valueA, $valueB) {
        return preg_replace('#(\d+)\/(\d+)\/(\d+)#', '$3$2$1', $valueA) > 
            preg_replace('#(\d+)\/(\d+)\/(\d+)#', '$3$2$1', $valueB);
    }
);

var_dump($taba);