Question

I have some pretty simple php code that returns binary image data from a database.

ob_start();

$stmt = $db->prepare($sql);
$stmt->execute(array($ImageID));
$stmt->bindColumn(1, $lob, PDO::PARAM_LOB);
$stmt->fetch(PDO::FETCH_BOUND);

ob_clean();
header("Content-Type: " . $content_type);

fpassthru($lob);

Let s call this script get_image.php. I m calling this script from another one to get the image data and then process it. LIke so.

$src = file_get_contents( example.com/get_image.php?ImageID=foo );

$src = imagecreatefromstring($src);
imagecopyresized($newfile, $src, 0, 0, 0, 0, $newwidth, $newheight, $origwidth, $origheight);

I m getting errors from the image processing functions saying the "Data is not in a recognized format". After taking a look at the response it looks like my $src variable includes the headers as well as the binary data. I ve been doing research but I can t figure out how to get rid of the header output and just work with the raw binary string. Any help is appreciated.

To be clear, if I print out the $src string, instead of raw binary data I get the following.

HTTP/1.1 200 OK
Date: Thu, 19 Nov 2009 17:33:01 GMT
Server: Apache/2.2.8 (Unix) ...
X-Powered-By: PHP/5.2.11
Connection: close
Content-Type: image/jpeg

/* Then all the binary data */

Answer 1

I m no PHP expert, which is probably where the real solution is (get the response body only, no headers) but I do know my HTTP. To that end, the headers and body of an HTTP request like you have above is always delimited by two <CR><LF> s. You should be able to take the response, and get a sub-string from there. Example iDontKnowPhp code:

$start = $src.positionOf( <CR><LF><CR><LF> )
$stop  = $src.lenght()
$img   = $src.sub($start, $stop)

Answer 2

It looks like the PHP fopen stream wrapper isn t stripping the header. Instead of file_get_contents try CURL instead:

<?php

$ch = curl_init("http://www.example.com/myimagescript.php");

curl_setopt($ch, CURLOPT_HEADER, 0);  // No headers
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);   // grab the content of the file
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);

$contents= curl_exec($ch);
curl_close($ch);


?>

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