reading a dynamic image to a string

[herc777]

This is how I put a jpg into a string.

---------------------------------
$File1 = "pic1.jpg";

// open for read/binary-safe
$objFH = fopen( $File1, "rb" );
$strBuffer1 = fread( $objFH, filesize( $File1 ) );
fclose( $objFH );
----------------------------------

Which is fine when pic1.jpg exists, but pic1.jpg is created live by
calling pic1.php which outputs a jpg, pic1.jpg.

If I try fopen( "pic1.php", "rb" ) it will give me the php file, I want
it to open the image file, preferably without writing it to disk.

Herc

[Peter van Schie]

I'm not sure if this is what you mean, but if you want to prevent the
fopen call when pic1.jpg doesn't exist, just use file_exists():

$File1 = "pic1.jpg";

// open for read/binary-safe
if (file_exists($File1))
{
$objFH = fopen( $File1, "rb" );
$strBuffer1 = fread( $objFH, filesize( $File1 ) );
fclose( $objFH );
}

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http://www.phpforums.nl

[herc777]

thanks but that's not what I was after, there's no pic1.jpg on the
disk, its the output from pic1.php.

like this
<img src="button.php?text=home">

will put an image on your page, a button graphic with the word 'home',
but there's no button.jpg anywhere on the server.

Is is possible to read the file button.jpg without writing it to disk
1st, you have to invoke PHP to parse button.php?

Herc

[Peter van Schie]

Okay, I get what you mean now.
Isn't it an option to write the imagedata to a session-var and then
read that sessionvar from the script including the button-creation
script?
That way you don't have to worry about the imagefile being overwritten
each time a user opens the page, since each user has his own session.

Peter.

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[Chung Leong]

Do $data = @file_get_contents("http://<server>/button.php?text=home").

Naturally, you'd need to resolve the relative URL first.

[herc777]

thanks that works!

Herc

[herc777]

button.php uses this

header("Content-type: image/jpeg");

and returns as a binary file instead of html. so button.jpg can't be
overwritten its just like fetching HTML but you fetch a graphic
instead. it will run the same routine again and again for the same
graphic though.

Herc