Covenvert Hex to binary

Good morning,
Ive got a PHP script which needs to accept a binary file in HEX, and write it to disc, is there an easy and quick process for converting HEX to a byte and then writing it to a file?

The file is passed through to the PHP script through $_POST['fileContents'], and looks like:-

So I suppose first thing I need to do is split the string into individual bytes and then convert each hex number to its binary and then write that to disc, but my attached code isnt the quickest in the world, is there a way I can speed it up?
$hexArray = explode("-", $_POST['fileContent']);
$write2Disc = ""

foreach ($hexArray as $hexElement)
	$write2Disc = $write2Disc . chr(hexdec($hexElement));

$myFile = "testFile.jpg";
$fh = fopen($myFile, 'a');
fwrite($fh, $write2Disc);

Open in new window

Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

You can use decbin() function to convert decimal to binary:
Try this.

$write2Disc = pack("H*",preg_replace('/-/','',$_POST['fileContent']))

Open in new window


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.