PHP处理textarea上传的数据

<?phpinclude("include/nl2p.php");  //nl2p处理POST过来的文本信息，把换行转换为<p></p>格式  //去除标签，把'替换为"  $text1=str_replace('\'','"',nl2p(htmlspecialchars($_POST["text1"],false)));   }  ?>

<?php  //显示在textarea  echo "<textarea>";  echo substr(str_replace("</p><p>","\n",$text),3,-4);  echo "</textarea>";  ?> 

<?php  //include/database_conn.php  function nl2p($string)  {      //$string = str_replace(array('<p>', '</p>', '<br>', '<br />'), '', $string);         return '<p>'.str_replace   (array("\r\n","\n","\r"), '</p><p>', $string).'</p>';  }  ?>