Class to generate images

[e_matthes@hotmail.com]

Hello everyone,

I'm trying to make a class that will generate images. I can get it to
work if the class and the instance of the class is in the same file.
However, I can't get it to work if I save the class as its own file,
and try to make an instance of it in another file. Any thoughts?

Here is the working version:

<?php

header("Content-type: image/png");
$imageRes = new Image(200, 300);
$imageRes->colorImage(255 ,0,0);
$image = $imageRes->getImage();
imagepng($image );

class Image {

private $imageRes;

function __construct($wi dthIn, $heightIn) {
$this->imageRes = imageCreate($wi dthIn, $heightIn);
}

function colorImage($rIn ,$gIn,$bIn) {
$red = imagecoloralloc ate( $this->imageRes, $rIn,$gIn,$bIn );
}

function getImage() {
return $this->imageRes;
}

} // END class

?>

Thanks for any help.
-Eric

[ZeldorBlat]

Re: Class to generate images

On Apr 17, 11:55 am, e_matt...@hotma il.com wrote:

Hello everyone,
>
I'm trying to make a class that will generate images. I can get it to
work if the class and the instance of the class is in the same file.
However, I can't get it to work if I save the class as its own file,
and try to make an instance of it in another file. Any thoughts?
>
Here is the working version:
>
<?php
>
header("Content-type: image/png");
$imageRes = new Image(200, 300);
$imageRes->colorImage(255 ,0,0);
$image = $imageRes->getImage();
imagepng($image );
>
class Image {
>
private $imageRes;
>
function __construct($wi dthIn, $heightIn) {
$this->imageRes = imageCreate($wi dthIn, $heightIn);
}
>
function colorImage($rIn ,$gIn,$bIn) {
$red = imagecoloralloc ate( $this->imageRes, $rIn,$gIn,$bIn );
}
>
function getImage() {
return $this->imageRes;
}
>
} // END class
>
?>
>
Thanks for any help.
-Eric

Make sure you require/include the file that contains the class
definition. If the class is in a file called Image.php then you might
have a page that looks like this:

require('Image. php');

header("Content-type: image/png");
$imageRes = new Image(200, 300);
$imageRes->colorImage(255 ,0,0);
$image = $imageRes->getImage();
imagepng($image );

Also look into __autoload() -- it will make things much easier when
you have a lot of classes.

<http://www.php.net/autoload>

[e_matthes@hotmail.com]

Re: Class to generate images

On Apr 17, 8:28 am, ZeldorBlat <zeldorb...@gma il.comwrote:

On Apr 17, 11:55 am, e_matt...@hotma il.com wrote:
>
>
>

Hello everyone,

>

I'm trying to make a class that will generate images. I can get it to
work if the class and the instance of the class is in the same file.
However, I can't get it to work if I save the class as its own file,
and try to make an instance of it in another file. Any thoughts?

>

Here is the working version:

>

<?php

>

header("Content-type: image/png");
$imageRes = new Image(200, 300);
$imageRes->colorImage(255 ,0,0);
$image = $imageRes->getImage();
imagepng($image );

>

class Image {

>

private $imageRes;

>

function __construct($wi dthIn, $heightIn) {
$this->imageRes = imageCreate($wi dthIn, $heightIn);
}

>

function colorImage($rIn ,$gIn,$bIn) {
$red = imagecoloralloc ate( $this->imageRes, $rIn,$gIn,$bIn );
}

>

function getImage() {
return $this->imageRes;
}

>

} // END class

>

?>

>

Thanks for any help.
-Eric

>
Make sure you require/include the file that contains the class
definition. If the class is in a file called Image.php then you might
have a page that looks like this:
>
require('Image. php');
>
header("Content-type: image/png");
$imageRes = new Image(200, 300);
$imageRes->colorImage(255 ,0,0);
$image = $imageRes->getImage();
imagepng($image );
>
Also look into __autoload() -- it will make things much easier when
you have a lot of classes.
>
<http://www.php.net/autoload>

I think this is what I tried. When I put the class in a separate
file, this is what I have:

<?php

// simple_phptests .php
include_once("I mage.php");
header("Content-type: image/png");
$imageRes = new Image(200, 300);
$imageRes->colorImage(255 ,0,0);
$image = $imageRes->getImage();
imagepng($image );

?>

<?php

// Image.php
class Image {

private $imageRes;

function __construct($wi dthIn, $heightIn) {
$this->imageRes = imageCreate($wi dthIn, $heightIn);
}
function colorImage($rIn ,$gIn,$bIn) {
$red = imagecoloralloc ate( $this->imageRes, $rIn,$gIn,$bIn );
}
function getImage() {
return $this->imageRes;
}

} // END class

?>

This works for all the other classes I have created, but not for this
image class. The message I get when I load simple_phptests .php is:

"The image simple_phptests .php cannot be displayed, because it
contains errors."

Any other ideas? Thanks

[Toby A Inkster]

Re: Class to generate images

e_matthes wrote:

This works for all the other classes I have created, but not for this
image class. The message I get when I load simple_phptests .php is:
>
"The image simple_phptests .php cannot be displayed, because it
contains errors."

Is there anything outside your <?php ... ?block? Any whitespace?

Could you provide a URL?

--
Toby A Inkster BSc (Hons) ARCS

http://tobyinkster.co.uk/

Geek of ~ HTML/SQL/Perl/PHP/Python*/Apache/Linux

* = I'm getting there!

[e_matthes@hotmail.com]

Re: Class to generate images

On Apr 18, 1:10 am, Toby A Inkster <usenet200...@t obyinkster.co.u k>
wrote:

e_matthes wrote:

This works for all the other classes I have created, but not for this
image class. The message I get when I load simple_phptests .php is:

>

"The image simple_phptests .php cannot be displayed, because it
contains errors."

>
Is there anything outside your <?php ... ?block? Any whitespace?
>
Could you provide a URL?
>
--
Toby A Inkster BSc (Hons) ARCShttp://tobyinkster.co. uk/
Geek of ~ HTML/SQL/Perl/PHP/Python*/Apache/Linux
>
* = I'm getting there!

Thank you for the whitespace suggestion. I thought whitespace only
made a problem at the beginning of a file, so I hadn't noticed the two
blank lines at the end of each file. Works now! Thanks again to both
of you.