PDF_get_parameter()

(PHP 4 >= 4.0.1, PECL pdflib >= 1.0.0)

Get string parameter

说明

PDF_get_parameter(resource $p,string $key,float $modifier): string

Gets the contents of some PDFlib parameter with string type.

The proper keys for pdf_get_parameter and pdf_get_value are under "Parameters and Values" under "A PDFlib Quick Reference" in the PDFlib reference manual (google is your friend).
To get the font name:
$fontname = pdf_get_parameter($pdf, "fontname", 0);
To get the font size:
$size = pdf_get_value($pdf, "fontsize", 0);