You firstly need to encode the image data you fetch to base64 using base64_encode(), then you must include the data properly inside your src-attribute (syntax: data:[<mediatype>][;base64],<data>), like this:
<?php
$result=base64_encode(file_get_contents("http://192.168.43.89/phpmyadmin/uploads/8.jpg"));
//header("content-type:image/jpeg"); --> you don't need this if you are outputting HTML, only if you are outputting the image directly
echo "<img src=\"data:image/jpeg;base64,$result\">";
?>
source: http://www.websiteoptimization.com/speed/tweak/inline-images/