pdf_js.php

<?php
require(__DIR__.'/tfpdf.php');

class PDF_JavaScript extends tFPDF {

    protected $javascript;
    protected $n_js;

    function IncludeJS($script, $isUTF8=false) {
        if(!$isUTF8)
            $script=utf8_encode($script);
        $this->javascript=$script;
    }

    function _putjavascript() {
        $this->_newobj();
        $this->n_js=$this->n;
        $this->_put('<<');
        $this->_put('/Names [(EmbeddedJS) '.($this->n+1).' 0 R]');
        $this->_put('>>');
        $this->_put('endobj');
        $this->_newobj();
        $this->_put('<<');
        $this->_put('/S /JavaScript');
        $this->_put('/JS '.$this->_textstring($this->javascript));
        $this->_put('>>');
        $this->_put('endobj');
    }

    function _putresources() {
        parent::_putresources();
        if (!empty($this->javascript)) {
            $this->_putjavascript();
        }
    }

    function _putcatalog() {
        parent::_putcatalog();
        if (!empty($this->javascript)) {
            $this->_put('/Names <</JavaScript '.($this->n_js).' 0 R>>');
        }
    }
}
?>