PHP Manual Function Reference Non-Text MIME Output PDF PDF Functions PDF_set_info_subject PDF_set_info_keywords PDF_set_info_title PDF_set_info_subject (PHP 4, PECL pdflib >= 1.0.0)PDF_set_info_subject — Fill the subject document info field [deprecated] Description This function is deprecated since PDFlib version 3, use PDF_set_info() instead.