show_image.php

<?php
$image = $_POST['name'];
$filename = 'media/'.$image;

if(is_file($filename)){
    $html="<img width=200 height=200 src='{$filename}' />";
    $result=array('html'=>$html);
}
else{
    $html='No image found';
    $result=array('html'=>$html);
}

echo json_encode($result);