TEXTO RTF1(VB) P/ UTF-8 PHP

achei algo que supostamente remove as tags e "limpa" o texto do rtf, segue em anexo, porém queria que essa função filtrasse na entrada do campo de texto como na imagem (anexo 1 ). Obrigado!

<?php

function rtf2text($filename) {
 // Read the data from the input file.
 //$filename = file_get_contents($filename);
 if (!strlen($filename))
 return "";

// Create empty stack array.

 $document = "";
 $stack = array();
 $j = -1;

// Read the data character-by- character…
for ($i = 0, $len = strlen($filename); $i < $len; $i++) {

 $c = $filename[$i];

// Depending on current character select the further actions.
 switch ($c) {
 // the most important key word backslash
 case "\\":
 // read next character
 $nc = $filename[$i + 1];

// If it is another backslash or nonbreaking space or hyphen,
// then the character is plain text and add it to the output stream.
if ($nc == '\\' && rtf_isPlainText($stack[$j]))

 $document .= '\\';
 elseif ($nc == '~' && rtf_isPlainText($stack[$j]))
 $document .= ' ';
 elseif ($nc == '_' && rtf_isPlainText($stack[$j]))
 $document .= '-';

// If it is an asterisk mark, add it to the stack.
elseif ($nc == '*')
$stack[$j]["*"] = true;
// If it is a single quote, read next two characters that are the hexadecimal notation
// of a character we should add to the output stream.
elseif ($nc == "'") {

 $hex = substr($filename, $i + 2, 2);
 if (rtf_isPlainText($stack[$j]))
 $document .= html_entity_decode("" . hexdec($hex) . ";");

//Shift the pointer.
$i += 2;
// Since, we’ve found the alphabetic character, the next characters are control word
// and, possibly, some digit parameter.
} elseif ($nc >= 'a' && $nc <= 'z' || $nc >= 'A' && $nc <= 'Z') {

 $word = "";
 $param = null;

// Start reading characters after the backslash.
for ($k = $i + 1, $m = 0; $k < strlen($filename); $k++, $m++) {
$nc = $filename[$k];
// If the current character is a letter and there were no digits before it,
// then we’re still reading the control word. If there were digits, we should stop
// since we reach the end of the control word.

 if ($nc >= 'a' && $nc <= 'z' || $nc >= 'A' && $nc <= 'Z') {
 if (empty($param))
 $word .= $nc;
 else
 break;
 // If it is a digit, store the parameter.
 } elseif ($nc >= '0' && $nc <= '9')
 $param .= $nc;
 // Since minus sign may occur only before a digit parameter, check whether
 // $param is empty. Otherwise, we reach the end of the control word.
 elseif ($nc == '-') {
 if (empty($param))
 $param .= $nc;
 else
 break;
 } else
 break;
 }
 // Shift the pointer on the number of read characters.
 $i += $m - 1;

 // Start analyzing what we’ve read. We are interested mostly in control words.
 $toText = "";
 switch (strtolower($word)) {
 // If the control word is "u", then its parameter is the decimal notation of the
 // Unicode character that should be added to the output stream.
 // We need to check whether the stack contains \ucN control word. If it does,
 // we should remove the N characters from the output stream.
 case "u":
 $toText .= html_entity_decode("" . dechex($param) . ";");
 $ucDelta = @$stack[$j]["uc"];
 if ($ucDelta > 0)
 $i += $ucDelta;
 break;
 // Select line feeds, spaces and tabs.
 case "par": case "page": case "column": case "line": case "lbr":
 $toText .= "\n";
 break;
 case "emspace": case "enspace": case "qmspace":
 $toText .= " ";
 break;
 case "tab": $toText .= "\t";
 break;
 // Add current date and time instead of corresponding labels.
 case "chdate": $toText .= date("m.d.Y");
 break;
 case "chdpl": $toText .= date("l, j F Y");
 break;
 case "chdpa": $toText .= date("D, j M Y");
 break;
 case "chtime": $toText .= date("H:i:s");
 break;
 // Replace some reserved characters to their html analogs.
 case "emdash": $toText .= html_entity_decode("—");
 break;
 case "endash": $toText .= html_entity_decode("–");
 break;
 case "bullet": $toText .= html_entity_decode("•");
 break;
 case "lquote": $toText .= html_entity_decode("‘");
 break;
 case "rquote": $toText .= html_entity_decode("’");
 break;
 case "ldblquote": $toText .= html_entity_decode("«");
 break;
 case "rdblquote": $toText .= html_entity_decode("»");
 break;
 // Add all other to the control words stack. If a control word
 // does not include parameters, set &param to true.
 default:
 $stack[$j][strtolower($word)] = empty($param) ? true : $param;
 break;
 }

// Add data to the output stream if required.
if (rtf_isPlainText($stack[$j]))

 $document .= $toText;
 }

 $i++;
 break;
 // If we read the opening brace {, then new subgroup starts and we add
 // new array stack element and write the data from previous stack element to it.
 //case "{":
 //array_push($stack, $stack[$j++]);
 //break;
 // If we read the closing brace }, then we reach the end of subgroup and should remove
 // the last stack element.
 case "}":
 array_pop($stack);
 $j--;
 break;
 // Skip “trash”.
 case '\0': case '\r': case '\f': case '\n': break;
 // Add other data to the output stream if required.
 default:
 //if (rtf_isPlainText($stack[$j]))
 $document .= $c;
 break;
 }
 }

// Return result.

 return $document;
}