Imagepng was working on my server then I deleted a bunch of stuff and copied it in again. Now my script

<?php

$height = 700;
$width = $height;
$im = ImageCreate($width, $height);
$bck = ImageColorAllocate($im, 0,0,0);

imagePng($im,"chart.png");

?>
gives me the error:

Warning: imagepng(): Unable to open 'chart.png' for writing in c:\hosting\member\blah\fpdf\chart.php on line 8

I need to email the png file out so I have to save it. I checked permissions with

<?php
if (is_writable( "C:\hosting\webhost4life\member\zorger\fpdf\starch art.png")) {
echo "is_writable";
} else {
echo " not writable";
}
?>

And the directory is apparently writable. What else can I try?

It was a permission problem, Everyone must be able to read and write to the file

I have just solved this same problem. I had

imagejpeg ($new,"map\ukmap.jpg");

and got the apparent permissions problem. Changing to

imagejpeg ($new,"map/ukmap.jpg");

fixed it fine!

Something that seems curious about this check

Is you are checking a file, not the directory itself.

For anyone that stumbles on this thread and wants to know how to set permissions, read the FAQ:
http://p2p.wrox.com/topic.asp?TOPIC_ID=11962

: )
Rich

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