image processing - A php file as img src -

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i want print image using img tag src php file, script process action @ server scirpt. have example code?

here test code no effect

img.html

<img src="visitimg.php" />

visitimg.php

<?  header('content-type: image/jpeg');  echo "<img src=\"btn_search_eng.jpg\" />";  ?>

use readfile:

<?php header('content-type: image/jpeg'); readfile('btn_search_eng.jpg'); ?>

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