如何将“../”添加到PHP echo img src中

Question

In my code I show some images in this way:

   ...
     <?php echo '<img src="' .$imageone. '" alt="" /> '?></a></div>
     <?php echo '<img src="' .$imagetwo. '" alt="" /> '?></a></div>
   ...

where $imageone, $imagetwo have path from Mysql database

e.g.
$imagesone = "images/exposition/02-05-2017-11-28-00-foto 2_b.JPG";

This code is working in the same place where I have my images folder, but now I need to put the same code in a subfolder page and I'd like to use the same image. So, I need to put dinamically "../" before my varible, something like this:

...
     <?php echo '<img src="../' .$imageone. '" alt="" /> '?></a></div>
     <?php echo '<img src="../' .$imagetwo. '" alt="" /> '?></a></div>
   ...

but it's not working.

Any suggestion?

EDIT This is my solution:

 if ($images1 != ""){

    $imageone = "../".$images1;

}

if ($images2 != ""){

    $imagetwo = "../".$images2;

}

in this way I fixed my code and it's working!

Answer 1

由于你在src之后使用双引号，你可以写下<img src="../$imageone" alt="" />没有必要使用简单的引号来编写变量，因为双引号获取变量号。