php - SELECTED not working with <option> tag inside a for loop/ while loop -

i want 1 of options in drop down selected default, please see code

<?php class html{      function output(){          $html='<td>'.'<select id="out">';         for($i=0;$i<21;$i++){             $html.='<option value="$i" if($i==5) { selected } >'. $i .'</option>';         }          return $html;     } }  echo html::output(); ?> 

here want value 5 selected default,but getting selected value 20. thank you!!

you're line incorrect. use instead:

$html .= '<option value="' . $i . '"' . ( $i==5 ? ' selected="selected"' : '' ) . '>' . $i . '</option>'; 

i'm making use of ternary comparison operator.