. // // See LICENSE.TXT file for more information. // ------------------------------------------------------------------- // // Description : This is a PHP class for parsing PDF documents. // //============================================================+ /** * @file * This is a PHP class for parsing PDF documents.
* @package com.tecnick.tcpdf * @author Nicola Asuni * @version 1.0.15 */ // include class for decoding filters require_once(\dirname(__FILE__).'/include/TCPDF_FILTERS.php'); /** * @class TCPDF_PARSER * This is a PHP class for parsing PDF documents.
* @package com.tecnick.tcpdf * @brief This is a PHP class for parsing PDF documents.. * @version 1.0.15 * @author Nicola Asuni - info@tecnick.com */ class TCPDF_PARSER { /** * Raw content of the PDF document. * @private */ private $pdfdata = ''; /** * XREF data. * @protected */ protected $xref = []; /** * Array of PDF objects. * @protected */ protected $objects = []; /** * Class object for decoding filters. * @private */ private $FilterDecoders; /** * Array of configuration parameters. * @private */ private $cfg = [ 'die_for_errors' => false, 'ignore_filter_decoding_errors' => true, 'ignore_missing_filter_decoders' => true, ]; // ----------------------------------------------------------------------------- /** * Parse a PDF document an return an array of objects. * @param string $data PDF data to parse * @param array $cfg array of configuration parameters: * 'die_for_errors' : if true termitate the program execution in case of error, otherwise thows an exception; * 'ignore_filter_decoding_errors' : if true ignore filter decoding errors; * 'ignore_missing_filter_decoders' : if true ignore missing filter decoding errors * @public * @since 1.0.000 (2011-05-24) */ public function __construct($data, $cfg = []) { if (empty($data)) { $this->Error('Empty PDF data.'); } // find the pdf header starting position if (($trimpos = \strpos($data, '%PDF-')) === false) { $this->Error('Invalid PDF data: missing %PDF header.'); } // get PDF content string $this->pdfdata = \substr($data, $trimpos); // get length $pdflen = \strlen($this->pdfdata); // set configuration parameters $this->setConfig($cfg); // get xref and trailer data $this->xref = $this->getXrefData(); // parse all document objects $this->objects = []; foreach ($this->xref['xref'] as $obj => $offset) { if (!isset($this->objects[$obj]) && ($offset > 0)) { // decode objects with positive offset $this->objects[$obj] = $this->getIndirectObject($obj, $offset, true); } } // release some memory unset($this->pdfdata); $this->pdfdata = ''; } /** * Set the configuration parameters. * @param array $cfg array of configuration parameters: * 'die_for_errors' : if true termitate the program execution in case of error, otherwise thows an exception; * 'ignore_filter_decoding_errors' : if true ignore filter decoding errors; * 'ignore_missing_filter_decoders' : if true ignore missing filter decoding errors * @public */ protected function setConfig($cfg) : void { if (isset($cfg['die_for_errors'])) { $this->cfg['die_for_errors'] = !!$cfg['die_for_errors']; } if (isset($cfg['ignore_filter_decoding_errors'])) { $this->cfg['ignore_filter_decoding_errors'] = !!$cfg['ignore_filter_decoding_errors']; } if (isset($cfg['ignore_missing_filter_decoders'])) { $this->cfg['ignore_missing_filter_decoders'] = !!$cfg['ignore_missing_filter_decoders']; } } /** * Return an array of parsed PDF document objects. * @return array array of parsed PDF document objects * @public * @since 1.0.000 (2011-06-26) */ public function getParsedData() { return [$this->xref, $this->objects]; } /** * Get Cross-Reference (xref) table and trailer data from PDF document data. * @param int $offset xref offset (if know) * @param array $xref previous xref array (if any) * @return array containing xref and trailer data * @protected * @since 1.0.000 (2011-05-24) */ protected function getXrefData($offset = 0, $xref = []) { if ($offset == 0) { // find last startxref if (\preg_match_all('/[\r\n]startxref[\s]*[\r\n]+([0-9]+)[\s]*[\r\n]+%%EOF/i', $this->pdfdata, $matches, \PREG_SET_ORDER, $offset) == 0) { $this->Error('Unable to find startxref'); } $matches = \array_pop($matches); $startxref = $matches[1]; } elseif (\strpos($this->pdfdata, 'xref', $offset) == $offset) { // Already pointing at the xref table $startxref = $offset; } elseif (\preg_match('/([0-9]+[\s][0-9]+[\s]obj)/i', $this->pdfdata, $matches, \PREG_OFFSET_CAPTURE, $offset)) { // Cross-Reference Stream object $startxref = $offset; } elseif (\preg_match('/[\r\n]startxref[\s]*[\r\n]+([0-9]+)[\s]*[\r\n]+%%EOF/i', $this->pdfdata, $matches, \PREG_OFFSET_CAPTURE, $offset)) { // startxref found $startxref = $matches[1][0]; } else { $this->Error('Unable to find startxref'); } // check xref position if (\strpos($this->pdfdata, 'xref', $startxref) == $startxref) { // Cross-Reference $xref = $this->decodeXref($startxref, $xref); } else { // Cross-Reference Stream $xref = $this->decodeXrefStream($startxref, $xref); } if (empty($xref)) { $this->Error('Unable to find xref'); } return $xref; } /** * Decode the Cross-Reference section * @param int $startxref offset at which the xref section starts (position of the 'xref' keyword) * @param array $xref previous xref array (if any) * @return array containing xref and trailer data * @protected * @since 1.0.000 (2011-06-20) */ protected function decodeXref($startxref, $xref = []) { $startxref += 4; // 4 is the length of the word 'xref' // skip initial white space chars: \x00 null (NUL), \x09 horizontal tab (HT), \x0A line feed (LF), \x0C form feed (FF), \x0D carriage return (CR), \x20 space (SP) $offset = $startxref + \strspn($this->pdfdata, "\x00\x09\x0a\x0c\x0d\x20", $startxref); // initialize object number $obj_num = 0; // search for cross-reference entries or subsection while (\preg_match('/([0-9]+)[\x20]([0-9]+)[\x20]?([nf]?)(\r\n|[\x20]?[\r\n])/', $this->pdfdata, $matches, \PREG_OFFSET_CAPTURE, $offset) > 0) { if ($matches[0][1] != $offset) { // we are on another section break; } $offset += \strlen($matches[0][0]); if ($matches[3][0] == 'n') { // create unique object index: [object number]_[generation number] $index = $obj_num.'_'.(int) ($matches[2][0]); // check if object already exist if (!isset($xref['xref'][$index])) { // store object offset position $xref['xref'][$index] = (int) ($matches[1][0]); } ++$obj_num; } elseif ($matches[3][0] == 'f') { ++$obj_num; } else { // object number (index) $obj_num = (int) ($matches[1][0]); } } // get trailer data if (\preg_match('/trailer[\s]*<<(.*)>>/isU', $this->pdfdata, $matches, \PREG_OFFSET_CAPTURE, $offset) > 0) { $trailer_data = $matches[1][0]; if (!isset($xref['trailer']) || empty($xref['trailer'])) { // get only the last updated version $xref['trailer'] = []; // parse trailer_data if (\preg_match('/Size[\s]+([0-9]+)/i', $trailer_data, $matches) > 0) { $xref['trailer']['size'] = (int) ($matches[1]); } if (\preg_match('/Root[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) { $xref['trailer']['root'] = (int) ($matches[1]).'_'.(int) ($matches[2]); } if (\preg_match('/Encrypt[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) { $xref['trailer']['encrypt'] = (int) ($matches[1]).'_'.(int) ($matches[2]); } if (\preg_match('/Info[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) { $xref['trailer']['info'] = (int) ($matches[1]).'_'.(int) ($matches[2]); } if (\preg_match('/ID[\s]*[\[][\s]*[<]([^>]*)[>][\s]*[<]([^>]*)[>]/i', $trailer_data, $matches) > 0) { $xref['trailer']['id'] = []; $xref['trailer']['id'][0] = $matches[1]; $xref['trailer']['id'][1] = $matches[2]; } } if (\preg_match('/Prev[\s]+([0-9]+)/i', $trailer_data, $matches) > 0) { // get previous xref $xref = $this->getXrefData((int) ($matches[1]), $xref); } } else { $this->Error('Unable to find trailer'); } return $xref; } /** * Decode the Cross-Reference Stream section * @param int $startxref offset at which the xref section starts * @param array $xref previous xref array (if any) * @return array containing xref and trailer data * @protected * @since 1.0.003 (2013-03-16) */ protected function decodeXrefStream($startxref, $xref = []) { // try to read Cross-Reference Stream $xrefobj = $this->getRawObject($startxref); $xrefcrs = $this->getIndirectObject($xrefobj[1], $startxref, true); if (!isset($xref['trailer']) || empty($xref['trailer'])) { // get only the last updated version $xref['trailer'] = []; $filltrailer = true; } else { $filltrailer = false; } if (!isset($xref['xref'])) { $xref['xref'] = []; } $valid_crs = false; $columns = 0; $sarr = $xrefcrs[0][1]; if (!\is_array($sarr)) { $sarr = []; } foreach ($sarr as $k => $v) { if (($v[0] == '/') && ($v[1] == 'Type') && (isset($sarr[($k + 1)]) && ($sarr[($k + 1)][0] == '/') && ($sarr[($k + 1)][1] == 'XRef'))) { $valid_crs = true; } elseif (($v[0] == '/') && ($v[1] == 'Index') && (isset($sarr[($k + 1)]))) { // first object number in the subsection $index_first = (int) ($sarr[($k + 1)][1][0][1]); // number of entries in the subsection $index_entries = (int) ($sarr[($k + 1)][1][1][1]); } elseif (($v[0] == '/') && ($v[1] == 'Prev') && (isset($sarr[($k + 1)]) && ($sarr[($k + 1)][0] == 'numeric'))) { // get previous xref offset $prevxref = (int) ($sarr[($k + 1)][1]); } elseif (($v[0] == '/') && ($v[1] == 'W') && (isset($sarr[($k + 1)]))) { // number of bytes (in the decoded stream) of the corresponding field $wb = []; $wb[0] = (int) ($sarr[($k + 1)][1][0][1]); $wb[1] = (int) ($sarr[($k + 1)][1][1][1]); $wb[2] = (int) ($sarr[($k + 1)][1][2][1]); } elseif (($v[0] == '/') && ($v[1] == 'DecodeParms') && (isset($sarr[($k + 1)][1]))) { $decpar = $sarr[($k + 1)][1]; foreach ($decpar as $kdc => $vdc) { if (($vdc[0] == '/') && ($vdc[1] == 'Columns') && (isset($decpar[($kdc + 1)]) && ($decpar[($kdc + 1)][0] == 'numeric'))) { $columns = (int) ($decpar[($kdc + 1)][1]); } elseif (($vdc[0] == '/') && ($vdc[1] == 'Predictor') && (isset($decpar[($kdc + 1)]) && ($decpar[($kdc + 1)][0] == 'numeric'))) { $predictor = (int) ($decpar[($kdc + 1)][1]); } } } elseif ($filltrailer) { if (($v[0] == '/') && ($v[1] == 'Size') && (isset($sarr[($k + 1)]) && ($sarr[($k + 1)][0] == 'numeric'))) { $xref['trailer']['size'] = $sarr[($k + 1)][1]; } elseif (($v[0] == '/') && ($v[1] == 'Root') && (isset($sarr[($k + 1)]) && ($sarr[($k + 1)][0] == 'objref'))) { $xref['trailer']['root'] = $sarr[($k + 1)][1]; } elseif (($v[0] == '/') && ($v[1] == 'Info') && (isset($sarr[($k + 1)]) && ($sarr[($k + 1)][0] == 'objref'))) { $xref['trailer']['info'] = $sarr[($k + 1)][1]; } elseif (($v[0] == '/') && ($v[1] == 'Encrypt') && (isset($sarr[($k + 1)]) && ($sarr[($k + 1)][0] == 'objref'))) { $xref['trailer']['encrypt'] = $sarr[($k + 1)][1]; } elseif (($v[0] == '/') && ($v[1] == 'ID') && (isset($sarr[($k + 1)]))) { $xref['trailer']['id'] = []; $xref['trailer']['id'][0] = $sarr[($k + 1)][1][0][1]; $xref['trailer']['id'][1] = $sarr[($k + 1)][1][1][1]; } } } // decode data if ($valid_crs && isset($xrefcrs[1][3][0])) { // number of bytes in a row $rowlen = ($columns + 1); // convert the stream into an array of integers $sdata = \unpack('C*', $xrefcrs[1][3][0]); // split the rows $sdata = \array_chunk($sdata, $rowlen); // initialize decoded array $ddata = []; // initialize first row with zeros $prev_row = \array_fill(0, $rowlen, 0); // for each row apply PNG unpredictor foreach ($sdata as $k => $row) { // initialize new row $ddata[$k] = []; // get PNG predictor value $predictor = (10 + $row[0]); // for each byte on the row for ($i = 1; $i <= $columns; ++$i) { // new index $j = ($i - 1); $row_up = $prev_row[$j]; if ($i == 1) { $row_left = 0; $row_upleft = 0; } else { $row_left = $row[($i - 1)]; $row_upleft = $prev_row[($j - 1)]; } switch ($predictor) { case 10: { // PNG prediction (on encoding, PNG None on all rows) $ddata[$k][$j] = $row[$i]; break; } case 11: { // PNG prediction (on encoding, PNG Sub on all rows) $ddata[$k][$j] = (($row[$i] + $row_left) & 0xff); break; } case 12: { // PNG prediction (on encoding, PNG Up on all rows) $ddata[$k][$j] = (($row[$i] + $row_up) & 0xff); break; } case 13: { // PNG prediction (on encoding, PNG Average on all rows) $ddata[$k][$j] = (($row[$i] + (($row_left + $row_up) / 2)) & 0xff); break; } case 14: { // PNG prediction (on encoding, PNG Paeth on all rows) // initial estimate $p = ($row_left + $row_up - $row_upleft); // distances $pa = \abs($p - $row_left); $pb = \abs($p - $row_up); $pc = \abs($p - $row_upleft); $pmin = \min($pa, $pb, $pc); // return minimum distance switch ($pmin) { case $pa: { $ddata[$k][$j] = (($row[$i] + $row_left) & 0xff); break; } case $pb: { $ddata[$k][$j] = (($row[$i] + $row_up) & 0xff); break; } case $pc: { $ddata[$k][$j] = (($row[$i] + $row_upleft) & 0xff); break; } } break; } default: { // PNG prediction (on encoding, PNG optimum) $this->Error('Unknown PNG predictor'); break; } } } $prev_row = $ddata[$k]; } // end for each row // complete decoding $sdata = []; // for every row foreach ($ddata as $k => $row) { // initialize new row $sdata[$k] = [0, 0, 0]; if ($wb[0] == 0) { // default type field $sdata[$k][0] = 1; } $i = 0; // count bytes in the row // for every column for ($c = 0; $c < 3; ++$c) { // for every byte on the column for ($b = 0; $b < $wb[$c]; ++$b) { if (isset($row[$i])) { $sdata[$k][$c] += ($row[$i] << (($wb[$c] - 1 - $b) * 8)); } ++$i; } } } $ddata = []; // fill xref if (isset($index_first)) { $obj_num = $index_first; } else { $obj_num = 0; } foreach ($sdata as $k => $row) { switch ($row[0]) { case 0: { // (f) linked list of free objects break; } case 1: { // (n) objects that are in use but are not compressed // create unique object index: [object number]_[generation number] $index = $obj_num.'_'.$row[2]; // check if object already exist if (!isset($xref['xref'][$index])) { // store object offset position $xref['xref'][$index] = $row[1]; } break; } case 2: { // compressed objects // $row[1] = object number of the object stream in which this object is stored // $row[2] = index of this object within the object stream $index = $row[1].'_0_'.$row[2]; $xref['xref'][$index] = -1; break; } default: { // null objects break; } } ++$obj_num; } } // end decoding data if (isset($prevxref)) { // get previous xref $xref = $this->getXrefData($prevxref, $xref); } return $xref; } /** * Get object type, raw value and offset to next object * @param int $offset object offset * @return array containing object type, raw value and offset to next object * @protected * @since 1.0.000 (2011-06-20) */ protected function getRawObject($offset = 0) { $objtype = ''; // object type to be returned $objval = ''; // object value to be returned // skip initial white space chars: \x00 null (NUL), \x09 horizontal tab (HT), \x0A line feed (LF), \x0C form feed (FF), \x0D carriage return (CR), \x20 space (SP) $offset += \strspn($this->pdfdata, "\x00\x09\x0a\x0c\x0d\x20", $offset); // get first char $char = $this->pdfdata[$offset]; // get object type switch ($char) { case '%': { // \x25 PERCENT SIGN // skip comment and search for next token $next = \strcspn($this->pdfdata, "\r\n", $offset); if ($next > 0) { $offset += $next; return $this->getRawObject($offset); } break; } case '/': { // \x2F SOLIDUS // name object $objtype = $char; ++$offset; if (\preg_match('/^([^\x00\x09\x0a\x0c\x0d\x20\s\x28\x29\x3c\x3e\x5b\x5d\x7b\x7d\x2f\x25]+)/', \substr($this->pdfdata, $offset, 256), $matches) == 1) { $objval = $matches[1]; // unescaped value $offset += \strlen($objval); } break; } case '(': // \x28 LEFT PARENTHESIS case ')': { // \x29 RIGHT PARENTHESIS // literal string object $objtype = $char; ++$offset; $strpos = $offset; if ($char == '(') { $open_bracket = 1; while ($open_bracket > 0) { if (!isset($this->pdfdata[$strpos])) { break; } $ch = $this->pdfdata[$strpos]; switch ($ch) { case '\\': { // REVERSE SOLIDUS (5Ch) (Backslash) // skip next character ++$strpos; break; } case '(': { // LEFT PARENHESIS (28h) ++$open_bracket; break; } case ')': { // RIGHT PARENTHESIS (29h) --$open_bracket; break; } } ++$strpos; } $objval = \substr($this->pdfdata, $offset, ($strpos - $offset - 1)); $offset = $strpos; } break; } case '[': // \x5B LEFT SQUARE BRACKET case ']': { // \x5D RIGHT SQUARE BRACKET // array object $objtype = $char; ++$offset; if ($char == '[') { // get array content $objval = []; do { // get element $element = $this->getRawObject($offset); $offset = $element[2]; $objval[] = $element; } while ($element[0] != ']'); // remove closing delimiter \array_pop($objval); } break; } case '<': // \x3C LESS-THAN SIGN case '>': { // \x3E GREATER-THAN SIGN if (isset($this->pdfdata[($offset + 1)]) && ($this->pdfdata[($offset + 1)] == $char)) { // dictionary object $objtype = $char.$char; $offset += 2; if ($char == '<') { // get array content $objval = []; do { // get element $element = $this->getRawObject($offset); $offset = $element[2]; $objval[] = $element; } while ($element[0] != '>>'); // remove closing delimiter \array_pop($objval); } } else { // hexadecimal string object $objtype = $char; ++$offset; if (($char == '<') && (\preg_match('/^([0-9A-Fa-f\x09\x0a\x0c\x0d\x20]+)>/iU', \substr($this->pdfdata, $offset), $matches) == 1)) { // remove white space characters $objval = \str_replace(["\x09", "\x0a", "\x0c", "\x0d", "\x20"], '', $matches[1]); $offset += \strlen($matches[0]); } elseif (($endpos = \strpos($this->pdfdata, '>', $offset)) !== false) { $offset = $endpos + 1; } } break; } default: { if (\substr($this->pdfdata, $offset, 6) == 'endobj') { // indirect object $objtype = 'endobj'; $offset += 6; } elseif (\substr($this->pdfdata, $offset, 4) == 'null') { // null object $objtype = 'null'; $offset += 4; $objval = 'null'; } elseif (\substr($this->pdfdata, $offset, 4) == 'true') { // boolean true object $objtype = 'boolean'; $offset += 4; $objval = 'true'; } elseif (\substr($this->pdfdata, $offset, 5) == 'false') { // boolean false object $objtype = 'boolean'; $offset += 5; $objval = 'false'; } elseif (\substr($this->pdfdata, $offset, 6) == 'stream') { // start stream object $objtype = 'stream'; $offset += 6; if (\preg_match('/^([\r]?[\n])/isU', \substr($this->pdfdata, $offset), $matches) == 1) { $offset += \strlen($matches[0]); if (\preg_match('/(endstream)[\x09\x0a\x0c\x0d\x20]/isU', \substr($this->pdfdata, $offset), $matches, \PREG_OFFSET_CAPTURE) == 1) { $objval = \substr($this->pdfdata, $offset, (int) $matches[0][1]); $offset += $matches[1][1]; } } } elseif (\substr($this->pdfdata, $offset, 9) == 'endstream') { // end stream object $objtype = 'endstream'; $offset += 9; } elseif (\preg_match('/^([0-9]+)[\s]+([0-9]+)[\s]+R/iU', \substr($this->pdfdata, $offset, 33), $matches) == 1) { // indirect object reference $objtype = 'objref'; $offset += \strlen($matches[0]); $objval = (int) ($matches[1]).'_'.(int) ($matches[2]); } elseif (\preg_match('/^([0-9]+)[\s]+([0-9]+)[\s]+obj/iU', \substr($this->pdfdata, $offset, 33), $matches) == 1) { // object start $objtype = 'obj'; $objval = (int) ($matches[1]).'_'.(int) ($matches[2]); $offset += \strlen($matches[0]); } elseif (($numlen = \strspn($this->pdfdata, '+-.0123456789', $offset)) > 0) { // numeric object $objtype = 'numeric'; $objval = \substr($this->pdfdata, $offset, $numlen); $offset += $numlen; } break; } } return [$objtype, $objval, $offset]; } /** * Get content of indirect object. * @param string $obj_ref object number and generation number separated by underscore character * @param int $offset object offset * @param bool $decoding if true decode streams * @return array containing object data * @protected * @since 1.0.000 (2011-05-24) */ protected function getIndirectObject($obj_ref, $offset = 0, $decoding = true) { $obj = \explode('_', $obj_ref); if (($obj === false) || (\count($obj) != 2)) { $this->Error('Invalid object reference: '.$obj); return; } $objref = $obj[0].' '.$obj[1].' obj'; // ignore leading zeros $offset += \strspn($this->pdfdata, '0', $offset); if (\strpos($this->pdfdata, $objref, $offset) != $offset) { // an indirect reference to an undefined object shall be considered a reference to the null object return ['null', 'null', $offset]; } // starting position of object content $offset += \strlen($objref); // get array of object content $objdata = []; $i = 0; // object main index do { $oldoffset = $offset; // get element $element = $this->getRawObject($offset); $offset = $element[2]; // decode stream using stream's dictionary information if ($decoding && ($element[0] == 'stream') && (isset($objdata[($i - 1)][0])) && ($objdata[($i - 1)][0] == '<<')) { $element[3] = $this->decodeStream($objdata[($i - 1)][1], $element[1]); } $objdata[$i] = $element; ++$i; } while (($element[0] != 'endobj') && ($offset != $oldoffset)); // remove closing delimiter \array_pop($objdata); // return raw object content return $objdata; } /** * Get the content of object, resolving indect object reference if necessary. * @param string $obj object value * @return array containing object data * @protected * @since 1.0.000 (2011-06-26) */ protected function getObjectVal($obj) { if ($obj[0] == 'objref') { // reference to indirect object if (isset($this->objects[$obj[1]])) { // this object has been already parsed return $this->objects[$obj[1]]; } elseif (isset($this->xref[$obj[1]])) { // parse new object $this->objects[$obj[1]] = $this->getIndirectObject($obj[1], $this->xref[$obj[1]], false); return $this->objects[$obj[1]]; } } return $obj; } /** * Decode the specified stream. * @param array $sdic stream's dictionary array * @param string $stream stream to decode * @return array containing decoded stream data and remaining filters * @protected * @since 1.0.000 (2011-06-22) */ protected function decodeStream($sdic, $stream) { // get stream length and filters $slength = \strlen($stream); if ($slength <= 0) { return ['', []]; } $filters = []; foreach ($sdic as $k => $v) { if ($v[0] == '/') { if (($v[1] == 'Length') && (isset($sdic[($k + 1)])) && ($sdic[($k + 1)][0] == 'numeric')) { // get declared stream length $declength = (int) ($sdic[($k + 1)][1]); if ($declength < $slength) { $stream = \substr($stream, 0, $declength); $slength = $declength; } } elseif (($v[1] == 'Filter') && (isset($sdic[($k + 1)]))) { // resolve indirect object $objval = $this->getObjectVal($sdic[($k + 1)]); if ($objval[0] == '/') { // single filter $filters[] = $objval[1]; } elseif ($objval[0] == '[') { // array of filters foreach ($objval[1] as $flt) { if ($flt[0] == '/') { $filters[] = $flt[1]; } } } } } } // decode the stream $remaining_filters = []; foreach ($filters as $filter) { if (\in_array($filter, TCPDF_FILTERS::getAvailableFilters())) { try { $stream = TCPDF_FILTERS::decodeFilter($filter, $stream); } catch (Exception $e) { $emsg = $e->getMessage(); if ((($emsg[0] == '~') && !$this->cfg['ignore_missing_filter_decoders']) || (($emsg[0] != '~') && !$this->cfg['ignore_filter_decoding_errors'])) { $this->Error($e->getMessage()); } } } else { // add missing filter to array $remaining_filters[] = $filter; } } return [$stream, $remaining_filters]; } /** * Throw an exception or print an error message and die if the K_TCPDF_PARSER_THROW_EXCEPTION_ERROR constant is set to true. * @param string $msg The error message * @public * @since 1.0.000 (2011-05-23) */ public function Error($msg) : void { if ($this->cfg['die_for_errors']) { die('TCPDF_PARSER ERROR: '.$msg); } else { throw new Exception('TCPDF_PARSER ERROR: '.$msg); } } } // END OF TCPDF_PARSER CLASS //============================================================+ // END OF FILE //============================================================+