<?
echo "bleh";
$fd = fopen("/tmp/hello.pdf", "w");
$info = PDF_get_info();
$pdffd = pdf_open($fd, $info);
PDF_begin_page($pdffd, 595.0, 842.0);
PDF_set_text_pos($pdffd, 50, 700);
PDF_show($pdffd, "Hello $REMOTE_HOST!\n");
PDF_end_page($pdffd);
PDF_close($pdffd);
?>

./configure --with-mysql=/usr --with-gd --with-zlib --with-apache=../apache_1.3.3 --enable-track-vars --with-pdflib

Warning: Wrong parameter count for pdf_close() in /home/httpd/html/pdf2.php3 on line 10

It worked with 3.0.6 though...