PHP Images Functions

Only showing part of an image

[chriswragg]

I am making a rating system on my website, where the number out of 10 is displayed as stars. I want to create an image that only shows part of my original image, for example half of a star. I tried the following code,

<?php
$w = 16 - ((16/10)*$_GET['id']);
header("Content-type: image/gif");
$im = imagecreatefromgif("full.gif");
$col = imagecolorallocate($im,30,30,42);
imagefilledrectangle($im, 16-$x,0,16,16,$col);
imagegif($im);
imagedestroy($im);

?>

but it just returned a normal full.gif image.

Please can I have some advice on where my code is going wrong.

The image is 16 by 16 px and the background color of my page is in $col

Thanks for any help

Chris

[ergophobe]

These images don't really need to be generated dynamically, which is a resource-intensive endeavour (though these are small images, so not that intensive).

Frankly, I would simply create a star and a half star in GIMP or PS and, depending on the rating, display as required. It's simple requires no server image processing and you'll get more caching benefit since you'll only have 2 images instead of 19 for every value from .5 to 10 stars.

[chriswragg]

Thanks for the advice

[StupidScript]

ergophobe is right ... again! ;)

But re: your code:

imagefilledrectangle($im, 16-$x,0,16,16,$col);

Where's the value for

$x

? If it's not initiallized, your line says:

imagefilledrectangle($im, 16-NULL,0,16,16,$col);

which is to say ... don't crop it at all.