


How to Extract Text from Word and Other Office Files in PHP
Retrieving text from Microsoft Office documents, including Word (.doc and .docx), Excel (.xlsx), and PowerPoint (.pptx), is often necessary for tasks such as searching within document content.
Reading Word Documents
For .doc files, a binary file approach can be used:
class DocxConversion{ // ... private function read_doc() { $fileHandle = fopen($this->filename, "r"); $line = @fread($fileHandle, filesize($this->filename)); $lines = explode(chr(0x0D),$line); $outtext = ""; foreach($lines as $thisline) { $pos = strpos($thisline, chr(0x00)); if (($pos !== FALSE)||(strlen($thisline)==0)) { } else { $outtext .= $thisline." "; } } $outtext = preg_replace("/[^a-zA-Z0-9\s\,\.\-\n\r\t@\/\_\(\)]/","",$outtext); return $outtext; } // ... }
For .docx files, which are essentially zip files containing XML, you'll need to:
class DocxConversion{ // ... private function read_docx(){ $striped_content = ''; $content = ''; $zip = zip_open($this->filename); if (!$zip || is_numeric($zip)) return false; while ($zip_entry = zip_read($zip)) { if (zip_entry_open($zip, $zip_entry) == FALSE) continue; if (zip_entry_name($zip_entry) != "word/document.xml") continue; $content .= zip_entry_read($zip_entry, zip_entry_filesize($zip_entry)); zip_entry_close($zip_entry); }// end while zip_close($zip); $content = str_replace('<tc>', " ", $content); $content = str_replace('', "\r\n", $content); $striped_content = strip_tags($content); return $striped_content; } // ... }</tc>
Reading Excel Files
This can be done by extracting text from the "xl/sharedStrings.xml" file within the Excel file:
class DocxConversion{ // ... function xlsx_to_text($input_file){ $xml_filename = "xl/sharedStrings.xml"; //content file name $zip_handle = new ZipArchive; $output_text = ""; if(true === $zip_handle->open($input_file)){ if(($xml_index = $zip_handle->locateName($xml_filename)) !== false){ $xml_datas = $zip_handle->getFromIndex($xml_index); $xml_handle = DOMDocument::loadXML($xml_datas, LIBXML_NOENT | LIBXML_XINCLUDE | LIBXML_NOERROR | LIBXML_NOWARNING); $output_text = strip_tags($xml_handle->saveXML()); }else{ $output_text .=""; } $zip_handle->close(); }else{ $output_text .=""; } return $output_text; } // ... }
Reading PowerPoint Files
To extract text from a PowerPoint presentation, open each slide (.xml) file within the zip container:
class DocxConversion{ // ... function pptx_to_text($input_file){ $zip_handle = new ZipArchive; $output_text = ""; if(true === $zip_handle->open($input_file)){ $slide_number = 1; //loop through slide files while(($xml_index = $zip_handle->locateName("ppt/slides/slide".$slide_number.".xml")) !== false){ $xml_datas = $zip_handle->getFromIndex($xml_index); $xml_handle = DOMDocument::loadXML($xml_datas, LIBXML_NOENT | LIBXML_XINCLUDE | LIBXML_NOERROR | LIBXML_NOWARNING); $output_text .= strip_tags($xml_handle->saveXML()); $slide_number++; } if($slide_number == 1){ $output_text .=""; } $zip_handle->close(); }else{ $output_text .=""; } return $output_text; } // ... }
Usage
To use this class for file conversion, instantiate it with the file path and call the convertToText() method:
$docObj = new DocxConversion("test.doc"); //$docObj = new DocxConversion("test.docx"); //$docObj = new DocxConversion("test.xlsx"); //$docObj = new DocxConversion("test.pptx"); echo $docText= $docObj->convertToText();
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