CODEWITHSUNDEEP
php
Abela
Abela

Reputation: 1233

Get image extension from dynamic image url

I am stuck on this, hoping somebody has an idea.

I am trying to determine the file extension of a remote dynamic image path.

https://d2sh4fq2xsdeg9.cloudfront.net/contentAsset/image/93e9fb86-8f30-4fea-bdb9-90d63eb67e44/image/byInode/1/filter/Resize,Jpeg/jpeg_q/70/resize_w/1000

or, say, https://placekitten.com/g/1000/1000

I have tried using parse_url and finfo_file as well as SplFileInfo but none of those worked in my testing of them. Maybe something in one of them I do not know about(?).

I thought about using file_get_contents -> file_put_contents and saving it locally, but that would not work without knowing the file extension, which is the root cause of all of this to begin with.

I cannot convert it into an image data: (base64) because that requires knowing the mime type, and that is not possible, as far as I know, without, again, knowing the file extension and/or saving it locally.

And, one cannot just assume that it is always going to be a xyz-file type.

And, doing some type of preg_match just seems like the worse way to go about this, as different developers/programs uses different methods for this kind of dynamic image resizing techniques.

I suppose I could always do a strpos($haystack, $needle) checking for a combination of needles (gif,png,jpeg,etc) but, well, uggggghhh to that idea, eh.

So, just thought that I would post here and see if anybody has any good idea on how to go about getting the extension from dynamic image uri's.

Upvotes: 0

Views: 709

Answers (3)

nice_dev
nice_dev

Reputation: 17805

Well, you can make a cURL request and check the content_type of the response header.

<?php 

$ch = curl_init();

curl_setopt($ch,CURLOPT_URL,"https://d2sh4fq2xsdeg9.cloudfront.net/contentAsset/image/93e9fb86-8f30-4fea-bdb9-90d63eb67e44/image/byInode/1/filter/Resize,Jpeg/jpeg_q/70/resize_w/1000");
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
$result = curl_exec($ch);
echo curl_getinfo($ch)['content_type'];
curl_close($ch);

Output:

image/jpeg

#Update:

If all you want to do is to just check the image extension and not want image file in return, then you can just make a HEAD request as mentioned by @SalmanA in the comments.

You need to add the following line to above curl request:

curl_setopt($ch,CURLOPT_CUSTOMREQUEST,"HEAD");

Upvotes: 3

Jay Gosai
Jay Gosai

Reputation: 279

First take the mime-type of the image using finfo.

$url = "https://d2sh4fq2xsdeg9.cloudfront.net/contentAsset/image/93e9fb86-8f30-4fea-bdb9-90d63eb67e44/image/byInode/1/filter/Resize,Jpeg/jpeg_q/70/resize_w/1000";
$finfo = new finfo(FILEINFO_MIME_TYPE);
$type = $finfo->buffer(file_get_contents($url));
print_r($type);

then get file extension using below 

function getExtension ($mime_type){

    $extensions = array('image/jpeg' => 'jpeg',
                        'text/xml' => 'xml');

    // Add as many other Mime Types / File Extensions as you like

    return $extensions[$mime_type];

}

Upvotes: 2

Pankaj Dadure
Pankaj Dadure

Reputation: 677

You can try:

$url = 'https://placekitten.com/g/1000/1000';
$type = get_headers($url, 1)["Content-Type"];
echo $type;

Upvotes: 0

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