Description:
------------
My computer setup is Apache 2.0.46,PHP 4.3.2, and Windows XP SP1. Only modifications to php.ini are: 'extension=php_gd2.dll' and 'log_errors' are enabled. Originally, I was trying to use the imagettftext() function to write text to a png file. I used the function in a similar context as described by the manual, and the text write was successful. However, I stumbled upon the discovery that the font file that the function uses was locked by either the webserver or PHP process, as I was not able to unlink or remove the font file.

I tried to isolate the problem by testing the code on Windows XP with Apache 1.3.27, Apache 2.0.46, and IIS 5.1 and either PHP 4.2.3, 4.3.2, 4.3.3RC1, or 5.0, so I am thinking that it has something to do with the operating system. Furthermore, this problem does not occur with a webserver running Apache/PHP 4.3.2 on Linux. Also, this problem applies to various true-type font files.

The problem only goes away after I stop or restart the webserver.

In summary, there are four functions that use a font file that lock it: imagettftext(), imagettfbbox(), imagefttext(), and imageftbbox().





Reproduce code:
---------------
$im = imagecreatefrompng('test.png');
$blue = imagecolorallocate($im, 0, 102, 255);
$font = 'tahoma.ttf';
//
// These four functions lock the font file and do not release it
//
imagettftext($im, 10, 0, 10, 25, $blue, $font, 'text');
imagettfbbox (20, 0, $font, 'text');
imagefttext ($im, 12, 0, 10, 20, 5, $font, 'text', $foo);
imageftbbox (12, 0, $font, 'text', $foo);

header('Content-Type: image/png');
imagepng($im);
imagedestroy($im);

unlink($font);

Expected result:
----------------
I expect to see the png image generated and the font file unlinked.

Actual result:
--------------
The image displays fine but the font file cannot be deleted.

(Windows Error Dialog Box after manually attempting to delete arial.ttf)

Cannot delete arial: It is being used by another person or program. Close any programs that might be using the file and try again.

(Apache Error Log)

[client 127.0.0.1] PHP Warning:  unlink(arial.ttf): Permission denied in C:\Apache2\htdocs\gd\dynamic.php on line 16