如何显示存储在数据库中的图像？

Question

<?php
   $query = "SELECT * FROM table WHERE id = 2";
   $result = mysqli_query($con, $query);
   $result_set = mysqli_fetch_array($result);
   echo $result_set['img'];
?>

Why do shows strange characters, not image?

Answer 1

You need to add Content-Type header at the beginning, something like

<?
  header('Content-Type: image/png');
?>

for the PNG image