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reading and writing data from a text file using php5


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://
www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html;
charset=iso-8859-1">
</head>
<body>
<form name="form1" method="post" action="phptext.php">
  <textarea name="txtdata" cols="100" rows="10" id="txtdata">
  <?php
  $filename = "mydata.txt";
  $content="";
  $data=$_POST['txtdata'];
  if(file_exists($filename))
 {
   $handle=fopen($filename,'r+');
   $content=fread($handle,10000);
   print($content);
 }
 else
 {
  $handle=fopen($filename,'w+');
 }
 if(isset($_POST['refresh']))
 {
   fwrite($handle,$data);
   print($content);
 }
?>
</textarea>
  <input name="refresh" type="submit" id="refresh" value="refresh">
</form>
</body>
</html>

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