有关img src属性的书写规范

Question

      <img  id="img" src="http://localhost/uc_server/avatar.php?uid=2&size=big" width="110px" height="160px" />其中uid=2    其实是想给uid赋值为超全局变量$_SESSION的值，怎么在src属性中将uid=“超全局变量$_SESSION”的值

Answer 1

<?php

$directoryAsset = isset($_SESSION['what'])?'upload/customers/'.$_SESSION['what']:'';

?>

src="//localhost/uc_server/avatar.php?uid=$directoryAsset&size=big"