I want to break from the loop after every fourth term of number in the loop.

I want to create a list of twenty people; in every tr should to be 4 people.

So, I want to break from the loop after every 4^th number of loop. My one tr will contain 4 td and every td value is incremented with respect to the loop like the first td will 1 second will 2 and last will 4, then it should break with a new tr and the value is in td like I said in increment order.

My code is below:

 <?php  for ($i = 0 ; $i<=20; $i++){?>
     <tr>

         <td>
             <img src="http://bootdey.com/img/Content/user_1.jpg" alt="">
             <a href="<?php echo $i ; // shoud to be 1 ?>" class="user-link">Full name 1</a>
             <span class="user-subhead">Member</span>
         </td>
          <td>
             <img src="http://bootdey.com/img/Content/user_1.jpg" alt="">
             <a href="<?php echo $i ; // shoud to be 2 ?>" class="user-link">Full name 1</a>
             <span class="user-subhead">Member</span>
         </td>

         <td>
             <img src="http://bootdey.com/img/Content/user_1.jpg" alt="">
             <a href="<?php echo $i ; // shoud to be 3 ?>" class="user-link">Full name 1</a>
             <span class="user-subhead">Member</span>
         </td>

         <td>
             <img src="http://bootdey.com/img/Content/user_1.jpg" alt="">
             <a href="<?php echo $i ; // shoud to be 4 ?>" class="user-link">Full name 1</a>
             <span class="user-subhead">Member</span>
         </td>

      </tr>

 <?php 
if($i%4==0){    echo "<tr></tr>";}


} ?>

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