bin('pdftotext'); return $bin && file_exists($bin) && is_executable($bin); } public function supportsExtension($extension) { return strtolower($extension) === 'pdf'; } public function supportsMime($mime) { return in_array( strtolower($mime), array( 'application/pdf', 'application/x-pdf', 'application/x-bzpdf', 'application/x-gzpdf' ) ); } /** * Accessor to get the location of the binary * * @param string $program Name of binary * @return string */ protected function bin($program = '') { // Get list of allowed search paths if ($location = $this->config()->binary_location) { $locations = array($location); } else { $locations = $this->config()->search_binary_locations; } // Find program in each path foreach($locations as $location) { $path = "{$location}/{$program}"; if(file_exists($path)) { return $path; } if (file_exists($path.'.exe')) { return $path.'.exe'; } } // Not found return null; } public function getContent($path) { if (!$path) { return ""; } // no file $content = $this->getRawOutput($path); return $this->cleanupLigatures($content); } /** * Invoke pdftotext with the given path * * @param string $path * @return string Output * @throws FileTextExtractor_Exception */ protected function getRawOutput($path) { if(!$this->isAvailable()) { throw new FileTextExtractor_Exception("getRawOutput called on unavailable extractor"); } exec(sprintf('%s %s - 2>&1', $this->bin('pdftotext'), escapeshellarg($path)), $content, $err); if ($err) { if (!is_array($err) && $err == 1) { // For Windows compatibility $err = $content; } throw new FileTextExtractor_Exception(sprintf( 'PDFTextExtractor->getContent() failed for %s: %s', $path, implode(PHP_EOL, $err) )); } return implode(PHP_EOL, $content); } /** * Removes utf-8 ligatures. * * @link http://en.wikipedia.org/wiki/Typographic_ligature#Computer_typesetting * * @param string $input * @return string */ protected function cleanupLigatures($input) { $mapping = array( 'ff' => 'ff', 'fi' => 'fi', 'fl' => 'fl', 'ffi' => 'ffi', 'ffl' => 'ffl', 'ſt' => 'ft', 'st' => 'st' ); return str_replace(array_keys($mapping), array_values($mapping), $input); } }