try to put a php variable to echo parent index number [closed]

echo "<li class='row'> 
  
 <div class='prtbrrr'>

  $meta[dual_pic1c]  ////printing  static  data working inside loop
   <br/>
  $meta[dual_pic1c]  ///// here i want the number should be dynamic I use .$i but not working
 

 
 </div>
   
 </li> ";