Laravel - How to get the image content size?

Question

The data the user is sending is not an image file but its content. How can I get its size without making it a file and use filesize and something similar?

The content of the image as an example:

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABLAAAASwCAYAA......

Is it possible to create a formula to calculate the size of the image content? something like strlen($imageContent).

Did you try `base64_decode` after `base64,` and retrieve the length of that decoded string? — Maarten Veerman, Dec 22 '20 at 08:55
I tried it after you said. I tried `mb_strlen(base64_decode($imageContent))` and it returned `2075849` however the size of file is `416 KB (426,720 bytes)`. — kodfire, Dec 22 '20 at 09:06
take a look at JavaScript based [answer](https://stackoverflow.com/a/49750491/3584881) and try to convert it into PHP — Bhaumik Pandhi, Dec 22 '20 at 09:26

score 1 · Answer 1 · answered Dec 22 '20 at 09:12

1

You need to use the 8bit encoding on mb_strlen:

$data = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABLAAAASwCAYAA......';
list($type, $data) = explode(';', $data);
list(, $data)      = explode(',', $data);
$data = base64_decode($data);

$size = mb_strlen($data, '8bit');

answered Dec 22 '20 at 09:12

Maarten Veerman

1,546
1
8
10

What didn't work? I just tested it, it does work in my case. – Maarten Veerman Dec 22 '20 at 10:35
And I just tested it too. The image size is `416 KB (426,720 bytes)` but the returned value of the `$size` is `2763849`. – kodfire Dec 22 '20 at 10:39

score 0 · Answer 2 · answered Dec 22 '20 at 08:57

0

You can make a file and then rapidly deleted.

$data = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABLAAAASwCAYAA......';
list($type, $data) = explode(';', $data);
list(, $data)      = explode(',', $data);
$data = base64_decode($data);
file_put_contents('/tmp/image.png', $data);

$size = getimagesize('/tmp/image.png');
unlink(/tmp/image.png);

answered Dec 22 '20 at 08:57

Mohamed Baklouti

121
9

As I said, I don't want to create a file and get the size. While I want to get the size only by content. – kodfire Dec 22 '20 at 09:07
with unlike the file will be deleted after you get the size – Mohamed Baklouti Dec 22 '20 at 09:10

Laravel - How to get the image content size?

2 Answers2