PHP jpeg binary draw (?)

[Anon]

Hi folks, I am looking for a way to have a PHP page be used as an image source. What I mean is that, I want to have something like the following:

< img src="http://www.mydomain.com/phpGetImage.php"> and I want the the PHP to look through a file which contains a list of images, one per line, gets the line count and it gets a random number from 1 to file line length, grabs the file from the servers space and returns the image in binary with the content type being jpeg so it actually daws it up and it doesn't just return a URL. This php file i am going to use it as some sort of ad banner type thing, but only to randomly return a dynamic picture from a completely diff server (image server). if anyone has seen something similar to this or can point me in the right direction, please email me or reply to the post.

thanks!
-agustin
[e-mail]

[daarius]

heres how to do it:

in your phpGetImage.php:
<pre>
// this will read file in an array. every line is an array key
$fileContent = file('path/to/file.txt');

// now shuffle the array
srand ((float)microtime()*1000000);
shuffle($fileContent);

// just get the first key from array, and read the image (assuming the lines in the file contains full URL to the images)

$bin = fopen ($fileContent[0], "rb");

// now get the image type. needed so that appropriate image code is sent to browser headers

$size = getimagesize($fileContent[0]);
if ($size && $bin) {
header("Content-type: {$size['mime']}");
fpassthru($bin);
}

// now close file
fclose ($bin);
exit;
</pre>

hope this would help.

regards,
Daarius...

[Anon]

thanks, that's highly useful... so i got this far... this is the script i have so far:

$banner_File = "header_images.txt" ;
$total_Bannersize = 15 ;
$rnd_Value = GetRandomValue(0, $total_Bannersize-1);

function getFileline($filename, $line_number) {

	 $fp = @fopen($filename, "r");

     $lnCounter = 0;

	 while (!feof ($fp)) {
		  $data = fgets($fp, 1024);

		   If ($lnCounter == $line_number){
			       $right_data = $data;
				   return $right_data;
			       break;
			 }

             $lnCounter++ ;
    }

}

function GetRandomValue($min, $max){
$mtime = ((double)microtime()* 100000);
$mtime = explode(" ", $mtime);
$mtime = doubleval($mtime[1]) + doubleval($mtime[0]);
mt_srand($mtime);
$randval = mt_rand($min, $max);
return ($randval);
}

$banner_Data = getFileline($banner_File, $rnd_Value) ;

$Banner = split("::",$banner_Data);
$BannerImageFullPath = "http://localhost/images/norcal/headers/" . $Banner[0];
echo $BannerImageFullPath;
$bin = fopen ($BannerImageFullPath, "rb");

$size = getimagesize($BannerImageFullPath);
if ($size && $bin) {
  header("Content-type: {$size['mime']}");
  fpassthru($bin);
}

fclose ($bin);

exit;

but it gives me the following errors:

Notice: Undefined offset: 1 in c:\inetpub\forum\main\hearder_images.php on line 28
http://localhost/images/norcal/headers/banner_04.jpg
Warning: fopen("http://localhost/images/norcal/headers/banner_04.jpg ", "rb") - No error in c:\inetpub\forum\main\hearder_images.php on line 39

Warning: getimagesize: Unable to open 'http://localhost/images/norcal/headers/banner_04.jpg ' for reading. in c:\inetpub\forum\main\hearder_images.php on line 41

Warning: fclose(): supplied argument is not a valid File-Handle resource in c:\inetpub\forum\main\hearder_images.php on line 47

what can i do to fix this?

[daarius]

following shall work. i have just tested it.

please change the env vars to suit your program.

<pre>
// copy images from user input and display (for mail preview)
$bFile = fopen($_GET['url'], "rb");

  $aSize = getimagesize($_GET['url']);
  if ($aSize && $bFile) {
     header('Content-type: '.(($aSize[2] == 1) ? 'image/gif' : 'image/jpeg'));
     fpassthru($bFile);
  }

  // now close file
  fclose ($bFile);
  exit();

</pre>