[FIXED] How to use Remote File within Imagemagick Command in PHP

Issue

I´m currently using Imagemagick on a shared hosted Webspace. Imagemagick is also installed on this webspace. Its versionString is ImageMagick 6.8.9-9 Q16 x86_64 2018-06-26 and its versionNumber is 1673.

Now my Question or problem: I want to convert a REMOTE FILE for example https://www.google.com/favicon.ico to a png image to use it afterwards. To achieve this I´m currently using this PHP Script:

<?php
   exec( "/usr/bin/convert convert https://www.google.com/favicon.ico favicon.png" );
?>

But this command doesn´t create the file favicon.png in the same folder. But if I download the favicon.ico file and store it on the server I can use this command and it works perfectly:

<?php
   exec( "/usr/bin/convert convert favicon.ico favicon.png" );
?>

So how can I use a remote file with the convert command in imagemagick without storing the file on my server? I also tried to create a new Image Object with $Imagick->getImageBlob(); -> https://secure.php.net/manual/de/imagick.getimageblob.php and inserted the output into the exec(); command like this

<?php
exec( "/usr/bin/convert convert " . $Imagick->getImageBlob() . "favicon.png" );
?> 

in PHP. But it only showed the error that this Command could be an attack.

I hope you can help me to solve this problem and thanks in advance!

PS: I can not edit anything in the Imagemagick settings or update the class/package either.

Solution

wget -O- https://www.google.com/favicon.ico | convert  ico:- favicon.jpg

Explanation: You should download the file with the "wget" and output into a standard output then pipe it to "convert". "ico:-" - this means input file type "image/ico" and take it from stdin.

Or just use:

 $imagick = new Imagick();
 $imagick->readImageBlob("https://www.google.com/favicon.ico");
 $image->writeImage('favicon.png');

Answered By - Nikolai

Answer Checked By - Candace Johnson (PHPFixing Volunteer)