PHP Truncate + messagebox

[kingzl3y]

Hey,

Firstly I'm new to PHP, so don't rofl if i sound a wee bit stupid :>

Secondly,

I'm creating a personal website for myself, on this website i have a guestbook, which is textfile driven (no db's just pure .txt's).

I've realised most guestbooks get spammed really easy, so i want to create a button which when pressed will 'truncate' the .txt and make it blank.

I've already came up with this:

<?php
if(isset($_POST['submit']) && $_POST['submit'] == 'Clear'){
  $filename = 'test.txt';

  if (is_writable($filename)) {

       if (!$handle = fopen($filename, 'w')) {
            echo "<h1>Cannot open file ($filename)</h1>";
            exit;
  }

       echo "<h1>Success, $filename has been cleared </h1>";

       fclose($handle);

  } else {
       echo "<h1>The file $filename is not writable</h1>";
  }
}
?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<input type="submit" name="submit" value="Clear" />
</form>

 

But when i click the button, it doesn't show the Headings (echo "<h1> blah blah") it just doesn't do anything.

So i had a go at fixing it...couldn't so i decided to choose JavaScript to show a messagebox instead of echo'ing

e.g.

File not writable > messagebox " File not writable" etc.

 

I'm not sure how to use JS in PHP so i google'd

After a few queries i came up with this:

<?php
if(isset($_POST['submit']) && $_POST['submit'] == 'Clear'){
  $filename = 'test.txt';

  if (is_writable($filename)) {

       if (!$handle = fopen($filename, 'w')) {
		echo "<script language=\"JavaScript\">\n";
		echo "window.alert("Yes");\n";
		echo "</script>";  
		            exit;
  }

		echo "<script language=\"JavaScript\">\n";
		echo "window.alert("NO");\n";
		echo "</script>";  

	   
       fclose($handle);

  } else {
		echo "<script language=\"JavaScript\">\n";
		echo "window.alert("Maybe");\n";
		echo "</script>";  

  }
}
?>
<br />
<input type="submit" name="submit" value="Clear" />
</div>

 

Thought it would of worked....you guessed, it didn't :>

i try to access the page and get this:

Parse error: syntax error, unexpected T_STRING, expecting ',' or ';' in /home/kingz/public_html/kingzl3y.co.uk/manager.php on line 60

 

Help pleassssssssssssse.

 

Liefejè!

 

 

[pocobueno1388]

This will fix your error messages:

 

<?php
if(isset($_POST['submit']) && $_POST['submit'] == 'Clear'){
  $filename = 'test.txt';

  if (is_writable($filename)) {

       if (!$handle = fopen($filename, 'w')) {
		echo "<script language=\"JavaScript\">\n";
		echo "window.alert('Yes');\n";
		echo "</script>";  
		            exit;
  }

		echo "<script language=\"JavaScript\">\n";
		echo "window.alert('NO');\n";
		echo "</script>";  

	   
       fclose($handle);

  } else {
		echo "<script language=\"JavaScript\">\n";
		echo "window.alert('Maybe');\n";
		echo "</script>";  

  }
}
?>
<br />
<input type="submit" name="submit" value="Clear" />
</div>

[kingzl3y]

Awesome!

Fast reply!

BUT! (stupid buts ><)

It isn't working.. i think there is a problem with the truncate part, it just doesn't do anything..

doesn't delete the contents in text.txt nor does it display a message box.

Is my code correct?

[pocobueno1388]

You never told it to delete anything...

 

<?php

if (isset($_POST['submit'])) {
    $filename = 'test.txt';
    
    if (is_writable($filename)) {
        
        if ($handle = fopen($filename, 'w')) {
            
            fputs($handle, "");
            fclose($handle);
            
            echo "<h1>Cleared</h1>";
            
        } else {
            
            echo "ERROR: Couldn't clear";
        }
        
    } else {
        echo "This file isn't writtable!";
    }
    
}


?>

<form method='post'>
<input type="submit" name="submit" value="Clear" />
</form>

 

See if that does what you want.

[trq]

Your code would be much easier to read if you get the indentation right. Also... simple, to the point messages are often more helpfull during debugging.

 

The problem however is most likely the fact that you had no <form> defined.

 

<?php

if (isset($_POST['submit']) && $_POST['submit'] == 'Clear') {
 $filename = 'test.txt';
 if (is_writable($filename)) {
   if (!$handle = fopen($filename, 'w')) {
     echo "Unable to open file";
   } else {
     echo "Success";
     fclose($handle);
 } else {
   echo "File not writtable";
 }
}

?>
<br />
<form method='post'>
 <input type="submit" name="submit" value="Clear" />
</form>
</div>