Encoding - how does it works:
i had a problem to use ISO8859-2(windows-1250 or Latin-2) - All Slavic Languages(Slovak, Czech, Polish, Slovenian etc...). Solution is:
PDF_set_parameter($pdf,"resourcefile","blabla/your project folder/lib/pdflib.upr");
//see PDFlib manual
pdf_set_font($pdf, "ArialBI", 14, "cp1250");
//ArialBI is Arial CE Bold Italic font.U have to left this font in pdflib.upr's folder
//cp1250 is name for code page 1250 cp1250.cpg
pdf_show_xy($pdf, "it works", 210,807);
//now it shold works, but!!!
//U have to install your CE fonts to your system and delete font files from:
//Program Files/Adobe/Acrobat 4.0/Resource/Font
//Why??
//if Adobe reader open pdf file, it search for:
// 1. embeded fonts
// 2. Adobe Reader self fonts!!!
// 3. system fonts
// more U can find here:
http://www.pdfzone.com/resources/tips/tip0045.html