Dynamic Image / Signature Generator - a simple code to change text on an image

BuffaloHELP

Feb 22 2006, 02:12 PM

In search of dynamically changing quote, saying or all other types of text on an image I came across a code that I have modified to fit my initial usage. This procedure requires two files and short knowledge of PHP. If you are familiar with Trap17's sig rotation code you will understand this procedure very fast.

Code 1: dynamic_sig.php (you can rename this to index.php and you'll see at the end why)
Code 2: a simple text file named anything (I will call it name.txt)

Code 1

CODE

<?php
header("Content-type: image/png");

$image = imagecreatefrompng("../images/sotw_background.png");

//imagecolorallocate($image, R, G, B) in HEX values
$font_black = imagecolorallocate($image, 2, 1, 8);
$font_blue = imagecolorallocate($image, 25, 0, 255);

$List = "name.txt";
$string = trim(file_get_contents($List));;

//($image, fontsize, rightindent, downindent, data, txtcolour)
imagestring($image, 3, 12, 3, "T17", $font_blue);
imagestring($image, 1, 86, 6, "SOTW", $font_black);
imagestring($image, 1, 110, 6, $string, $font_black);

imagepng($image);
imagedestroy($image);

?>

Code 2

CODE

WINNER - USERNAME

For a working demo please refer to #23, #24 and #25 here http://www.trap17.com/forums/index.php?s=&...ndpost&p=222107

Let's break it down. As you can see in Code 1

CODE

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

that HEADER calls for PNG as image type. This is crucial since only PNG images can handle dynamically applied text.

CODE

$image = imagecreatefrompng("../images/sotw_background.png");

states the location of the background image you are going to use. It looks like this IPB Image

CODE

//imagecolorallocate($image, R, G, B) in HEX values
$font_black = imagecolorallocate($image, 2, 1, 8);
$font_blue = imagecolorallocate($image, 25, 0, 255);

as the remark that I made, the value of color in HEX will determine the text color you choose. I made two to make it as a comparison.

CODE

$List = "name.txt";
$string = trim(file_get_contents($List));;

This assigns a SINGLE line characters from file named name.txt. And then assigns to variable name STRING from the opened text file. If you don't want to use external file, you can simply set

CODE

$string = "your text 1";
$string = "your text 2";

etc. You can even do a random text where

CODE

$select = rand(1,7);
if($select==1)$string = "text 1";
if($select==2)$string = "text 2";
if($select==3)$string = "text 3";
if($select==4)$string = "text 4";
if($select==5)$string = "text 5";
if($select==6)$string = "text 6";
if($select==7)$string = "text 7";

CODE

//($image, fontsize, rightindent, downindent, data, txtcolour)
imagestring($image, 3, 12, 3, "T17", $font_blue);
imagestring($image, 1, 86, 6, "SOTW", $font_black);
imagestring($image, 1, 110, 6, $string, $font_black);

This is where the magic happens. As you can see the position of the text is determined by second two numbers. The first number determines the font size. Instead of preset characters, i.e. T17 and SOTW, you can have $string1, $string2 etc.

The rest is needed to close up the PNG image and safely project reconstructed new image onto the browser.

About the sig rotator reference: By renaming dynamic_sig.php to index.php and placing it under a directory called filename.png (yes directory with extension), you can use your newly created dynamic image in the forum

CODE

[img]http://source_site/filename.png[/img]

This will display the dynamic image as though it's been there all along.

One key note is that text is only written within the boundary of an image. So if you are looking for larger image simply make your picture larger in dimension. You can have multiple rows and variable font sizes.

Johnny

Feb 26 2006, 10:19 AM

Great stuff Buffalo, and thanks for the help.

nehmanator333

Jul 8 2006, 03:40 AM

Yeah, it's very useful.

electron

Jul 8 2006, 05:01 AM

Hay i have a site dedicated towards this thing.
I made this sig generator and people can use it as well.

Just register fill in the text and you are done.

here is the link:
www.esigs.be

My sig is also using that.

peroim

Jul 9 2006, 07:08 PM

this is a great code, i've been looking for something like this everywere. tyvm

farsiscript

Jul 11 2006, 01:37 PM

thanks dear BuffaloHELP
i want write sig maker ( random text , visit ip address and more ) how can i do that ?
This is my questions
for example do you have GD image soruce or tutorials ?
i must user GD image ?
thanks

Regain

Nov 20 2006, 11:04 PM

cool THX ^^

sendot

Apr 7 2007, 02:38 AM

Great script, but for some reason when I upload it to my ftp and link it to forums it shows up as the dreaded red x. Do you have any ideas why this may be? I can send you my edited PHP file and everything if you need, I just really wanna get this thing working.

EDIT: I apologize, but I already fixed the problem. Thanks again for the script.

Imtay22

Apr 9 2007, 09:55 PM

Wow, I was looking all over for a code like this one! I downloaded one once, but it included over 100 php files. which would take 2 hours to download and upload. Now I found a code that has two files and takes up little space!

joacorock

Apr 10 2007, 09:16 AM

It's very a nice code, and useful!

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iGuest

Feb 8 2008, 11:35 PM

adding images to images
Dynamic Image / Signature Generator

How would you add an image on top of $image in a specific location?

-question by halo2pac

galexcd

Jan 30 2008, 02:18 AM

QUOTE(FeedBacker @ Jan 26 2008, 11:45 AM)

Is there a way to change the font face??

If you use imagettftext() instead of imagestring() you can specify a certain true type font on your server.

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