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- <?php
- $result = pdf2text ('2D Digital Animation NC III.pdf')
- echo $result;
- function decodeAsciiHex($input) {
- $output = "";
- $isOdd = true;
- $isComment = false;
- for($i = 0, $codeHigh = -1; $i < strlen($input) && $input[$i] != '>'; $i++) {
- $c = $input[$i];
- if($isComment) {
- if ($c == '\r' || $c == '\n')
- $isComment = false;
- continue;
- }
- switch($c) {
- case '\0': case '\t': case '\r': case '\f': case '\n': case ' ': break;
- case '%':
- $isComment = true;
- break;
- default:
- $code = hexdec($c);
- if($code === 0 && $c != '0')
- return "";
- if($isOdd)
- $codeHigh = $code;
- else
- $output .= chr($codeHigh * 16 + $code);
- $isOdd = !$isOdd;
- break;
- }
- }
- if($input[$i] != '>')
- return "";
- if($isOdd)
- $output .= chr($codeHigh * 16);
- return $output;
- }
- function decodeAscii85($input) {
- $output = "";
- $isComment = false;
- $ords = array();
- for($i = 0, $state = 0; $i < strlen($input) && $input[$i] != '~'; $i++) {
- $c = $input[$i];
- if($isComment) {
- if ($c == '\r' || $c == '\n')
- $isComment = false;
- continue;
- }
- if ($c == '\0' || $c == '\t' || $c == '\r' || $c == '\f' || $c == '\n' || $c == ' ')
- continue;
- if ($c == '%') {
- $isComment = true;
- continue;
- }
- if ($c == 'z' && $state === 0) {
- $output .= str_repeat(chr(0), 4);
- continue;
- }
- if ($c < '!' || $c > 'u')
- return "";
- $code = ord($input[$i]) & 0xff;
- $ords[$state++] = $code - ord('!');
- if ($state == 5) {
- $state = 0;
- for ($sum = 0, $j = 0; $j < 5; $j++)
- $sum = $sum * 85 + $ords[$j];
- for ($j = 3; $j >= 0; $j--)
- $output .= chr($sum >> ($j * 8));
- }
- }
- if ($state === 1)
- return "";
- elseif ($state > 1) {
- for ($i = 0, $sum = 0; $i < $state; $i++)
- $sum += ($ords[$i] + ($i == $state - 1)) * pow(85, 4 - $i);
- for ($i = 0; $i < $state - 1; $i++)
- $ouput .= chr($sum >> ((3 - $i) * 8));
- }
- return $output;
- }
- function decodeFlate($input) {
- return @gzuncompress($input);
- }
- function getObjectOptions($object) {
- $options = array();
- if (preg_match("#<<(.*)>>#ismU", $object, $options)) {
- $options = explode("/", $options[1]);
- @array_shift($options);
- $o = array();
- for ($j = 0; $j < @count($options); $j++) {
- $options[$j] = preg_replace("#\s+#", " ", trim($options[$j]));
- if (strpos($options[$j], " ") !== false) {
- $parts = explode(" ", $options[$j]);
- $o[$parts[0]] = $parts[1];
- } else
- $o[$options[$j]] = true;
- }
- $options = $o;
- unset($o);
- }
- return $options;
- }
- function getDecodedStream($stream, $options) {
- $data = "";
- if (empty($options["Filter"]))
- $data = $stream;
- else {
- $length = !empty($options["Length"]) ? $options["Length"] : strlen($stream);
- $_stream = substr($stream, 0, $length);
- foreach ($options as $key => $value) {
- if ($key == "ASCIIHexDecode")
- $_stream = decodeAsciiHex($_stream);
- if ($key == "ASCII85Decode")
- $_stream = decodeAscii85($_stream);
- if ($key == "FlateDecode")
- $_stream = decodeFlate($_stream);
- }
- $data = $_stream;
- }
- return $data;
- }
- function getDirtyTexts(&$texts, $textContainers) {
- for ($j = 0; $j < count($textContainers); $j++) {
- if (preg_match_all("#\[(.*)\]\s*TJ#ismU", $textContainers[$j], $parts))
- $texts = array_merge($texts, @$parts[1]);
- elseif(preg_match_all("#Td\s*(\(.*\))\s*Tj#ismU", $textContainers[$j], $parts))
- $texts = array_merge($texts, @$parts[1]);
- }
- }
- function getCharTransformations(&$transformations, $stream) {
- preg_match_all("#([0-9]+)\s+beginbfchar(.*)endbfchar#ismU", $stream, $chars, PREG_SET_ORDER);
- preg_match_all("#([0-9]+)\s+beginbfrange(.*)endbfrange#ismU", $stream, $ranges, PREG_SET_ORDER);
- for ($j = 0; $j < count($chars); $j++) {
- $count = $chars[$j][1];
- $current = explode("\n", trim($chars[$j][2]));
- for ($k = 0; $k < $count && $k < count($current); $k++) {
- if (preg_match("#<([0-9a-f]{2,4})>\s+<([0-9a-f]{4,512})>#is", trim($current[$k]), $map))
- $transformations[str_pad($map[1], 4, "0")] = $map[2];
- }
- }
- for ($j = 0; $j < count($ranges); $j++) {
- $count = $ranges[$j][1];
- $current = explode("\n", trim($ranges[$j][2]));
- for ($k = 0; $k < $count && $k < count($current); $k++) {
- if (preg_match("#<([0-9a-f]{4})>\s+<([0-9a-f]{4})>\s+<([0-9a-f]{4})>#is", trim($current[$k]), $map)) {
- $from = hexdec($map[1]);
- $to = hexdec($map[2]);
- $_from = hexdec($map[3]);
- for ($m = $from, $n = 0; $m <= $to; $m++, $n++)
- $transformations[sprintf("%04X", $m)] = sprintf("%04X", $_from + $n);
- } elseif (preg_match("#<([0-9a-f]{4})>\s+<([0-9a-f]{4})>\s+\[(.*)\]#ismU", trim($current[$k]), $map)) {
- $from = hexdec($map[1]);
- $to = hexdec($map[2]);
- $parts = preg_split("#\s+#", trim($map[3]));
- for ($m = $from, $n = 0; $m <= $to && $n < count($parts); $m++, $n++)
- $transformations[sprintf("%04X", $m)] = sprintf("%04X", hexdec($parts[$n]));
- }
- }
- }
- }
- function getTextUsingTransformations($texts, $transformations) {
- $document = "";
- for ($i = 0; $i < count($texts); $i++) {
- $isHex = false;
- $isPlain = false;
- $hex = "";
- $plain = "";
- for ($j = 0; $j < strlen($texts[$i]); $j++) {
- $c = $texts[$i][$j];
- switch($c) {
- case "<":
- $hex = "";
- $isHex = true;
- break;
- case ">":
- $hexs = str_split($hex, 4);
- for ($k = 0; $k < count($hexs); $k++) {
- $chex = str_pad($hexs[$k], 4, "0");
- if (isset($transformations[$chex]))
- $chex = $transformations[$chex];
- $document .= html_entity_decode("&#x".$chex.";");
- }
- $isHex = false;
- break;
- case "(":
- $plain = "";
- $isPlain = true;
- break;
- case ")":
- $document .= $plain;
- $isPlain = false;
- break;
- case "\\":
- $c2 = $texts[$i][$j + 1];
- if (in_array($c2, array("\\", "(", ")"))) $plain .= $c2;
- elseif ($c2 == "n") $plain .= '\n';
- elseif ($c2 == "r") $plain .= '\r';
- elseif ($c2 == "t") $plain .= '\t';
- elseif ($c2 == "b") $plain .= '\b';
- elseif ($c2 == "f") $plain .= '\f';
- elseif ($c2 >= '0' && $c2 <= '9') {
- $oct = preg_replace("#[^0-9]#", "", substr($texts[$i], $j + 1, 3));
- $j += strlen($oct) - 1;
- $plain .= html_entity_decode("&#".octdec($oct).";");
- }
- $j++;
- break;
- default:
- if ($isHex)
- $hex .= $c;
- if ($isPlain)
- $plain .= $c;
- break;
- }
- }
- $document .= "\n";
- }
- return $document;
- }
- function pdf2text($filename) {
- $infile = @file_get_contents($filename, FILE_BINARY);
- if (empty($infile))
- return "";
- $transformations = array();
- $texts = array();
- preg_match_all("#obj(.*)endobj#ismU", $infile, $objects);
- $objects = @$objects[1];
- for ($i = 0; $i < count($objects); $i++) {
- $currentObject = $objects[$i];
- if (preg_match("#stream(.*)endstream#ismU", $currentObject, $stream)) {
- $stream = ltrim($stream[1]);
- $options = getObjectOptions($currentObject);
- if (!(empty($options["Length1"]) && empty($options["Type"]) && empty($options["Subtype"])))
- continue;
- $data = getDecodedStream($stream, $options);
- if (strlen($data)) {
- if (preg_match_all("#BT(.*)ET#ismU", $data, $textContainers)) {
- $textContainers = @$textContainers[1];
- getDirtyTexts($texts, $textContainers);
- } else
- getCharTransformations($transformations, $data);
- }
- }
- }
- return getTextUsingTransformations($texts, $transformations);
- }
- ?>
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