php - How to embed if statement inside echo

Question

I'm gettin' a headache on that. I need to put if statement inside an echo (this echo is in a function, it's for a form submit actually)

Here is an example on a partial of my code. In this situation, how can I put theses if statement inside my echo??

   <?php echo '<td><select id="depuis" name="depuis">
    <option value='4' <?php if(isset($_POST['depuis']) && $_POST['depuis'] == '4'){ echo 'selected'; } else { echo ''; } ?> ></option>
    <option value='1' <?php if(isset($_POST['depuis']) && $_POST['depuis'] == '1'){ echo 'selected'; } else { echo ''; } ?> >2 ans et moins</option>
    <option value='2' <?php if(isset($_POST['depuis']) && $_POST['depuis'] == '2'){ echo 'selected'; } else { echo ''; } ?> >2 &agrave; 5 ans</option>
    <option value='3' <?php if(isset($_POST['depuis']) && $_POST['depuis'] == '3'){ echo 'selected'; } else { echo ''; } ?> >5 ans et plus</option>
</select>
</td>'
; ?>

Answer 1

Everything is php so need to use more than the first <?php Finish each echo before checking with if. Like this:

<?php 
  echo '<td><select id="depuis" name="depuis">
    <option value="4"'; 
    if(isset($_POST['depuis']) && $_POST['depuis'] == '4') { 
      echo ' selected'; 
    } 
 echo ' >Something here maybe?</option>...etc