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Editorial Team
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Asked: 2026-06-14T14:54:02+00:00

I have a webpage that I want to dynamically display content depending on the

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I have a webpage that I want to dynamically display content depending on the path of the page. For example, I may want http://www.page.php?input=red or maybe I’ll want http://www.page.php?input=blue. In both cases, the actual content is located in ./$dir/.

I’ve got the gist of this down, but I can’t for the life of me figure out images. I have an image in each directory at ./$dir/subdir/images/sample.png. How do I output HTML that dynamically alters the image element?

Here is sample code to demonstrate my question.

<html>
    <?php
        $dir = $_GET["input"];
        $img = imagecreatefrompng("./$dir/subdir/images/sample.png");
    ?>
    <body>
        <img src="???" alt="sample image" />
    </body>
</html>

I want to display ./red/subdir/images/sample.png when I have input=red, ./blue/subdir/images/sample.png when input=blue, etc.

Many thanks in advance for any help.

Edit:
I don’t even know if I can store an image into a variable as seen on line 4. I’m really new to PHP.

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1 Answer

  1. Editorial Team

    If only one image:

    <img src="<?= $img ?>" alt="sample image" />

    If loads of images, use an array.

    I would also set the alt text on a database, pull it from there and write it the same way I suggested writing the src.

    Just so you can understand:

    <?= $img ?>

    Does exactly the same thing as

    <?php echo $img; ?>

    Except with a bit more class.

    edit: Typo on the indent made my code disappear.

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