<?php
 add_action("wp_ajax_get_img_post_and_title", "get_img_post_and_title");
 add_action("wp_ajax_nopriv_get_img_post_and_title", "get_img_post_and_title");
    function get_img_post_and_title(){
     $return = array(
    'post_id' => $_POST['data']['id'],
    'post_title' => get_the_title($_POST['data']['id']),
    'post_thumb' => wp_get_attachment_image_url(get_post_thumbnail_id($_POST['data']['id']))
    );
    wp_send_json_success($return);
   }
?>

$(function() {
    $('body').on('click', '.post-link', function() {
    var ajax = {};
    ajax.id= $(this).attr('rel');
    var ajaxurl = '/wp-admin/admin-ajax.php';
    jQuery.post(
    ajaxurl,
    {
    'action': 'get_img_post_and_title',
    'data': ajax
    },
    function(response){
    if(response.success){
    $('#post-cont').append("<input value='"+response.data.post_id+"'> "+response.data.post_title+" <img src='"+response.data.post_thumb+"'/ </input>");
    }
    }
    );
});
});

var names = ['aa', 'ab', 'ac', 'ad'];
for (var i=0; i<names.length; i++) {
  if ($('#post-cont').find('input[name=' + names[i] + ']').length < 1) {
  $('#post-cont').append('<input name="'+ names[i] +'"> --- </input>' );
  break;
  }
}