Pass query string to page

Question

I wrote this function in my functions.php

function header_resized_img ($path, $width, $height) {
    $image = wp_get_image_editor($path);
    if (!is_wp_error($image)) {
        $image->resize(9999, $height, false);
        $orig_size = $image->get_size();
        $image->crop($orig_size['width']/2-$width/2, $orig_size['height']/2-$height/2, $width, $height);
        $image->stream( $mime_type = 'image/jpeg');
    }
}

To make it work, i created a file named page-image.php, then a page with permalink http://www.example.com/image/. Inside page-image.php i've put (just a test)

header_resized_img (get_header_image(), 414, 700);

which, in facts, does output the resized/cropped image when i visit it. Now i want to make it more flexible and pass parameters through URL. I tried query strings using $_GET, then i found get_query_arg, but none of these seems to do the trick. How could i do this? Thank you.

Hi, Welcome to WPSE. Can you please make an example of what you want to do? — Johansson
– Johansson, Commented May 15, 2017 at 19:18
Sure. If i visit the url like example.com/image/?w=360&h=480&img_path=imgpath it should execute my function on the image in imgpath, resizing and cropping it. Page should just output the image so i can embed it — Daniele Squalo
– Daniele Squalo, Commented May 15, 2017 at 19:23
@JackJohansson Doing this cause i need multiple versions of the same image — Daniele Squalo
– Daniele Squalo, Commented May 15, 2017 at 19:24
I posted an answer, see if it works. If not, check your log and see if there's some useful info in it. — Johansson
– Johansson, Commented May 15, 2017 at 19:28
I deleted the answer temporarily to figure out a way to solve your problem. Will be back shortly. — Johansson
– Johansson, Commented May 15, 2017 at 20:51

Johansson · Accepted Answer · 2017-05-15 19:45:13Z

1

This should actually work for you:

function header_resized_img () {
    $image = wp_get_image_editor($_GET['path']);
    $height = $_GET['height'];
    $width =  $_GET['width'];
    if (!is_wp_error($image)) {
        $image->resize(9999, $height, false);
        $orig_size = $image->get_size();
        $image->crop($orig_size['width']/2-$width/2, $orig_size['height']/2-$height/2, $width, $height);
        $image->stream( $mime_type = 'image/jpeg');
    }
}

and include your function somewhere in the template:

header_resized_img();

Then try accessing this URL:

http://example.com/image/?width=500&height=400&path=some-url

To generate your image.

edited May 15, 2017 at 19:45

answered May 15, 2017 at 19:27

Johansson

15.4k11 gold badges44 silver badges80 bronze badges

It opens the 404 template

Daniele Squalo
– Daniele Squalo

2017-05-15 19:44:09 +00:00
Commented May 15, 2017 at 19:44
@DanieleSqualo Sorry my bad, i forgot a slash in the URL. Check out the new URL.

Johansson
– Johansson

2017-05-15 19:45:45 +00:00
Commented May 15, 2017 at 19:45
Same thing, a 404 page

Daniele Squalo
– Daniele Squalo

2017-05-15 19:49:02 +00:00
Commented May 15, 2017 at 19:49
replace the url with this : http://example.com/index.php?page_id=YOUR_PAGE_ID&width=500&height=400&path=some-url. If it works, let me know to write a rewrite rule for your page.

Johansson
– Johansson

2017-05-15 19:53:59 +00:00
Commented May 15, 2017 at 19:53
Again, the 404 page :/

Daniele Squalo
– Daniele Squalo

2017-05-15 20:40:29 +00:00
Commented May 15, 2017 at 20:40

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