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pkSML
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Joined: 29 May 2006
Posts: 955
Location: Michigan, USA
PostPosted: Wed Jun 14, 2006 5:01 pm    Post subject: Image Question Reply with quote
Hi there.

I am requesting help for a very easy topic. I'm sure most of you know the answer to this question.
I'm new to PHP, but have good experience in Perl. I'm rewriting a Perl script in PHP.
Here's the Perl code:
Code:
sub show_image {
  my ($img_name) = @_;
  open(FILE, "$img_name.gif");
  binmode(FILE);
  my $filesize = -s FILE;
  read(FILE, my $image, $filesize);
  close(FILE);
  return $image; 
}

The Perl script sends an image header to the browser and the snippet above actually sends the image.

MY PROBLEM:
I want to send an image to the browser that already exists.
I know PHP can send dynamic images, but I just want it to send the image as is. I'm looking for the most concise code to accomplish this.

Thanks.
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AbyssUnderground
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Joined: 31 Dec 2004
Posts: 3855
PostPosted: Wed Jun 14, 2006 5:25 pm    Post subject: Reply with quote
Just make the filename echo to a <img src tag from a variable. Easy :-)
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pkSML
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Joined: 29 May 2006
Posts: 955
Location: Michigan, USA
PostPosted: Wed Jun 14, 2006 6:07 pm    Post subject: Don't quite have it yet... Reply with quote
Thanks for the quick response Andy!

I tried this:
Code:
<?php
header('Content-type: image/gif');
$handle = fopen("image.gif", "r");
print $handle;
fclose($handle);
?>


Here's what results: "Resource id #2"
Not quite what I was hoping for... :)
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AbyssUnderground
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Joined: 31 Dec 2004
Posts: 3855
PostPosted: Wed Jun 14, 2006 6:08 pm    Post subject: Reply with quote
Code:
<?php
header('Content-type: image/gif');
$handle = fopen("image.gif", "r");
print "<img src='$handle'>";
fclose($handle);
?>


Try that.
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pkSML
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Joined: 29 May 2006
Posts: 955
Location: Michigan, USA
PostPosted: Wed Jun 14, 2006 6:11 pm    Post subject: Reply with quote
You respond so fast, it's almost creepy!

It generates a 404 error. Here's what it's looking for:
http://localhost/php/printgif/Resource%20id%20#2

It's supposed to be looking for image.gif.

Thanks in advance.
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AbyssUnderground
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Joined: 31 Dec 2004
Posts: 3855
PostPosted: Wed Jun 14, 2006 6:18 pm    Post subject: Reply with quote
Cant connect to your localhost from here!
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pkSML
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Joined: 29 May 2006
Posts: 955
Location: Michigan, USA
PostPosted: Wed Jun 14, 2006 6:20 pm    Post subject: Reply with quote
Temporary URL:
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Last edited by pkSML on Fri Feb 02, 2007 3:25 am; edited 1 time in total
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AbyssUnderground
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Joined: 31 Dec 2004
Posts: 3855
PostPosted: Wed Jun 14, 2006 6:25 pm    Post subject: Reply with quote
It looks like "fopen()" isnt compatable in making it output the file contents in this way.
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pkSML
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Joined: 29 May 2006
Posts: 955
Location: Michigan, USA
PostPosted: Wed Jun 14, 2006 6:38 pm    Post subject: Figured it out! Reply with quote
Thanks for all your help Andy.

I searched php.net and found file_get_contents() to be "binary-safe".
I also read an informative article at http://www.onlamp.com/pub/a/php/2002/12/12/php_foundations.html

Here's the code that works!

Code:
<?php
header('Content-type: image/gif');
$handle = file_get_contents("image.gif");
print "$handle";
fclose($handle);
?>

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MonkeyNation
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Joined: 05 Feb 2005
Posts: 921
Location: Cardiff
PostPosted: Wed Jun 14, 2006 9:28 pm    Post subject: Reply with quote
The reason fopen() alone doesn't work is because all fopen does is create a handle.
You need to fread() or something in conjunction with fopen() to get it to display the contents of the stream.
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cmxflash
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Joined: 11 Dec 2004
Posts: 872
PostPosted: Thu Jun 15, 2006 12:41 am    Post subject: Reply with quote
Code:
<?php
header("content-type: image/png");
readfile("yourimage.png");
?>


Pretty easy.
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pkSML
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Joined: 29 May 2006
Posts: 955
Location: Michigan, USA
PostPosted: Thu Jun 15, 2006 2:25 am    Post subject: Reply with quote
Thanks cmxflash!

That really helps. I was hoping there was a way to print images in PHP that was that simple.

I used it in a script that requests the US Government's Homeland Security status. It displays an image that corresponds with the level.

You can check it out at my homepage (http://stephen.calvarybucyrus.org) or access it directly at http://stephen.calvarybucyrus.org/hls/hls.php?image.

If anybody wants the source, just email me!
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aprelium
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Joined: 22 Mar 2002
Posts: 6800
PostPosted: Thu Jun 15, 2006 11:09 am    Post subject: Re: Figured it out! Reply with quote
pkSML wrote:
Code:
<?php
header('Content-type: image/gif');
$handle = file_get_contents("image.gif");
print "$handle";
fclose($handle);
?>


He is an reduced version of the above code:

Code:
<?php
header('Content-type: image/gif');
readfile("image.gif");
?>


A slightly modified version which purpose is speeding HTTP requests when using a dumb client (or an old browser):

Code:
<?php
$filename = "image.gif";
header('Content-type: image/gif');
header('Content-length: ' . filesize($filename));
readfile($filename);
?>

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