This » PECL extension is not bundled with
PHP. Information for installing this PECL extension may be found in
the manual chapter titled Installation of PECL extensions. Additional information
such as new releases, downloads, source files, maintainer
information, and a CHANGELOG, can be located here: » https://pecl.php.net/package/pdflib.
To get these functions to work in PHP < 4.3.9,
you have to compile PHP with –with-pdflib[=DIR] . DIR is the PDFlib
base install directory, defaults to /usr/local.