FPDI 合并 多个pdf文件

<?php // // FPDI - Version 1.4 // // Copyright 2004-2010 Setasign - Jan Slabon // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // if (!defined ('PDF_TYPE_NULL')) define ('PDF_TYPE_NULL', 0); if (!defined ('PDF_TYPE_NUMERIC')) define ('PDF_TYPE_NUMERIC', 1); if (!defined ('PDF_TYPE_TOKEN')) define ('PDF_TYPE_TOKEN', 2); if (!defined ('PDF_TYPE_HEX')) define ('PDF_TYPE_HEX', 3); if (!defined ('PDF_TYPE_STRING')) define ('PDF_TYPE_STRING', 4); if (!defined ('PDF_TYPE_DICTIONARY')) define ('PDF_TYPE_DICTIONARY', 5); if (!defined ('PDF_TYPE_ARRAY')) define ('PDF_TYPE_ARRAY', 6); if (!defined ('PDF_TYPE_OBJDEC')) define ('PDF_TYPE_OBJDEC', 7); if (!defined ('PDF_TYPE_OBJREF')) define ('PDF_TYPE_OBJREF', 8); if (!defined ('PDF_TYPE_OBJECT')) define ('PDF_TYPE_OBJECT', 9); if (!defined ('PDF_TYPE_STREAM')) define ('PDF_TYPE_STREAM', 10); if (!defined ('PDF_TYPE_BOOLEAN')) define ('PDF_TYPE_BOOLEAN', 11); if (!defined ('PDF_TYPE_REAL')) define ('PDF_TYPE_REAL', 12); require_once('pdf_context.php'); if (!class_exists('pdf_parser', false)) { class pdf_parser { /** * Filename * @var string */ var $filename; /** * File resource * @var resource */ var $f; /** * PDF Context * @var object pdf_context-Instance */ var $c; /** * xref-Data * @var array */ var $xref; /** * root-Object * @var array */ var $root; /** * PDF version of the loaded document * @var string */ var $pdfVersion; /** * For reading encrypted documents and xref/objectstreams are in use * * @var boolean */ var $readPlain = true; /** * Constructor * * @param string $filename Source-Filename */ function pdf_parser($filename) { $this->filename = $filename; $this->f = @fopen($this->filename, 'rb'); if (!$this->f) $this->error(sprintf('Cannot open %s !', $filename)); $this->getPDFVersion(); $this->c = new pdf_context($this->f); // Read xref-Data $this->xref = array(); $this->pdf_read_xref($this->xref, $this->pdf_find_xref()); // Check for Encryption $this->getEncryption(); // Read root $this->pdf_read_root(); } /** * Close the opened file */ function closeFile() { if (isset($this->f) && is_resource($this->f)) { fclose($this->f); unset($this->f); } } /** * Print Error and die * * @param string $msg Error-Message */ function error($msg) { die('<b>PDF-Parser Error:</b> '.$msg); } /** * Check Trailer for Encryption */ function getEncryption() { if (isset($this->xref['trailer'][1]['/Encrypt'])) { $this->error('File is encrypted!'); } } /** * Find/Return /Root * * @return array */ function pdf_find_root() { if ($this->xref['trailer'][1]['/Root'][0] != PDF_TYPE_OBJREF) { $this->error('Wrong Type of Root-Element! Must be an indirect reference'); } return $this->xref['trailer'][1]['/Root']; } /** * Read the /Root */ function pdf_read_root() { // read root $this->root = $this->pdf_resolve_object($this->c, $this->pdf_find_root()); } /** * Get PDF-Version * * And reset the PDF Version used in FPDI if needed */ function getPDFVersion() { fseek($this->f, 0); preg_match('/\d\.\d/',fread($this->f,16),$m); if (isset($m[0])) $this->pdfVersion = $m[0]; return $this->pdfVersion; } /** * Find the xref-Table */ function pdf_find_xref() { $toRead = 1500; $stat = fseek ($this->f, -$toRead, SEEK_END); if ($stat === -1) { fseek ($this->f, 0); } $data = fread($this->f, $toRead); $pos = strlen($data) - strpos(strrev($data), strrev('startxref')); $data = substr($data, $pos); if (!preg_match('/\s*(\d+).*$/s', $data, $matches)) { $this->error('Unable to find pointer to xref table'); } return (int) $matches[1]; } /** * Read xref-table * * @param array $result Array of xref-table * @param integer $offset of xref-table */ function pdf_read_xref(&$result, $offset) { $o_pos = $offset-min(20, $offset); fseek($this->f, $o_pos); // set some bytes backwards to fetch errorious docs $data = fread($this->f, 100); $xrefPos = strrpos($data, 'xref'); if ($xrefPos === false) { fseek($this->f, $offset); $c = new pdf_context($this->f); $xrefStreamObjDec = $this->pdf_read_value($c); if (is_array($xrefStreamObjDec) && isset($xrefStreamObjDec[0]) && $xrefStreamObjDec[0] == PDF_TYPE_OBJDEC) { $this->error(sprintf('This document (%s) probably uses a compression technique which is not supported by the free parser shipped with FPDI.', $this->filename)); } else { $this->error('Unable to find xref table.'); } } if (!isset($result['xref_location'])) { $result['xref_location'] = $o_pos+$xrefPos; $result['max_object'] = 0; } $cylces = -1; $bytesPerCycle = 100; fseek($this->f, $o_pos = $o_pos+$xrefPos+4); // set the handle directly after the "xref"-keyword $data = fread($this->f, $bytesPerCycle); while (($trailerPos = strpos($data, 'trailer', max($bytesPerCycle*$cylces++, 0))) === false && !feof($this->f)) { $data .= fread($this->f, $bytesPerCycle); } if ($trailerPos === false) { $this->error('Trailer keyword not found after xref table'); } $data = substr($data, 0, $trailerPos); // get Line-Ending preg_match_all("/(\r\n|\n|\r)/", substr($data, 0, 100), $m); // check the first 100 bytes for linebreaks $differentLineEndings = count(array_unique($m[0]));