有什么方法可以使用php从.doc文件中可靠地获取纯文本？

Question

我尝试过的事情：

read_doc（）：

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;}

getRawWordText（）：

function getRawWordText($filename) {
if(file_exists($filename)) {
    if(($fh = fopen($filename, 'r')) !== false ) {
        $headers = fread($fh, 0xA00);
        $n1 = ( ord($headers[0x21C]) - 1 );// 1 = (ord(n)*1) ; Document has from 0 to 255 characters
        $n2 = ( ( ord($headers[0x21D]) - 8 ) * 256 );// 1 = ((ord(n)-8)*256) ; Document has from 256 to 63743 characters
        $n3 = ( ( ord($headers[0x21E]) * 256 ) * 256 );// 1 = ((ord(n)*256)*256) ; Document has from 63744 to 16775423 characters
        $n4 = ( ( ( ord($headers[0x21F]) * 256 ) * 256 ) * 256 );// 1 = (((ord(n)*256)*256)*256) ; Document has from 16775424 to 4294965504 characters
        $textLength = ($n1 + $n2 + $n3 + $n4);// Total length of text in the document
        $extracted_plaintext = fread($fh, $textLength);
        $extracted_plaintext = mb_convert_encoding($extracted_plaintext,'UTF-8');
         // if you want to see your paragraphs in a new line, do this
         // return nl2br($extracted_plaintext);
         return ($extracted_plaintext);
    } else {
        return false;
    }
} else {
    return false;
}  }

DocCounter： https://github.com/joeblurton/doccounter

DocumentParser： https://github.com/LukeMadhanga/PHPDocumentParser

文件文本： https://www.phpclasses.org/package/8908-PHP-Convert-DOCX-DOC-PDF-to-plain-text.html#information https://gist.github.com/HadoDokis/bb7b4a7763a56eba2c5c

PhpWord： https://github.com/PHPOffice/PHPWord

还有我暂时无法回忆的其他几个功能。

该项目的目标是提取文本并计算没有空格的字符的数量。

标准是，与MS Word字符计数相比，给定的解决方案最大错误容限为 10％。

谢谢！