Coding Images to change

[jamieoliver22]

How exactly do you install the GD libary? What directory do they go?

(And where is php.ini?)

Thanks
J

 

[root]

Do you have access to the server? (i.e is this a home server or are you buying hosting?)...

to check if the GD library is installed create a simple script like this

<?php
phpinfo();
?>

That page will tell you all the modules that are installed.

 

[jamieoliver22]

Hiya.

It is a paid deciated server (even tho i get it for free as i know the right people )
I have access to the server (through a cPanel). I can easily contact my host to ask them to add anything.

The file is here:
http://yextreme.matrixnetworks.net/testground/info.php

Thanks
Jamie

 

[root]

The problem is that you don't have the GD module installed...


they'll have to add the library (either.so or .dll depending on whether it's Linux/unix or windows).
and they'll have to alter the PHP.ini file to tell it to load the module as well...

I don't thin that this can be done with cpanel access so you'll have to get your hosting provider to do this for you.

 

[jamieoliver22]

I have send a support ticket to them.
Hopefully I should get a reply in a few hours.

J

 

[jamieoliver22]

Okay, I managed to get the GD Libary installed!

I got the IP one too work! Now, how do you edit the size and content and such?
How to you make it overlap an exsisting PNG image?

Thanks
Jamie

 

[root]

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

headers are sent to make sure the broswer knows it's a picture, and not text.

$im = @ImageCreateFromPNG ("php.png");
if(!$im) {

all that line does is check that an image can be created, if you can create an image space then nothing else happens.

$len = 8*(strlen($ip))+6;
$hig = 16;

those lines check the length of the IP address, so a different sized address will generate different numbers, (eg 4.0.0.1 or 217.195.167.105) so a larger box is drawn for a longer text string...

$img_handle = ImageCreate ($len, $hig) or die ("Cannot Create image");
that line actually creates the image where $len is the horizontal length of the image and $hig is the height, so you can change these to be however you want them to to create large or small images.

$back_color = ImageColorAllocate ($img_handle, 0, 0, 0);
The first colour set is the back colour for the image

$txt_color = ImageColorAllocate ($img_handle, 255, 255, 255);

and that sets the forecolour, note that you cab define and use any number of colours that you want.

ImageString ($img_handle, 3, 5, 1, "$ip", $txt_color);
Image string function draws text on a picture


ImagePng ($img_handle); }
and that actually forms the picture from al the information that been stored in the memory space $inmg_handle

?>


You coluld draw on an image by getting rid of the second rceateimage line and just using the first image pointer ($im) which I'd only used as a test...

to be honest you'll find far more help on the PHP site than I can feasibly give you here, just use the function search to look up some of the functions, and you could look at the related functions as well.

 

[jamieoliver22]

Okay thank you!

I have a PNG image (made in CS2) and I just want to add text over it in differnt places.
Is this easy to do?

J

 

[root]

yes... so long as you know where you want to put the text...

ImageString ($img_handle, 3, 5, 1, "$ip", $txt_color);

draws an picture of the words, the arguments are text size (1-5). xposition, (from left) yposition (from top), the actualy string, and the colour (defined with imagecolorallocate() function.

to position text on a picture, just find where you want to put it, and then enter the co-ordinates of where you'd like it.