PHP and Javascript - cant use echo command

[mbrown174]

Hello.

Im currently trying to make a preview page for my admin area.

My idea was to create a page called preview.php. Apon entering some text into a textfield entitled 'Homepage' on my main admin page, one could then click the preview button which would take them to preview.php.

However I havent gotten that far yet as I cant seem to use Javascript within my PHP.

<?php
  $open = echo '<script language="JavaScript"> document.getElementsByName("Homepage").value </script>' 
  ?>

  <?php function preview()
  { $preview = $open;
$file = fopen('preview.txt', "a");
fwrite ($file, $preview );
fclose($file); }
?>

The first bit of code was an attempt to capture the contents of the admin area field called Homepage, the second bit of code I had hoped would store it in a text document called Preview.txt

I keep getting error messages relating to T ECHO - so I assume its something relating to my first bit of code. Any pointers?
Thanks for any help!

[leatherback]

Not sure what you want to acheave..

either you want:

<?php
'<script language="JavaScript"> document.getElementsByName("Homepage").value </script>' ;
?>

or:

<?php
$open = "echo '<script language="JavaScript"> document.getElementsByName("Homepage").value </script>' ";
?>

[Horizon88]

If I'm understanding you correctly, you want to have a text-box input, where a user types a name of a file, then your page loads that file, while still having the text-box on the page, in which case:

<?PHP
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
   // form has been posted, check it
   // all valid-pages go here to prevent security breaches by entering things like ../../etc/passwd
   $valid_pages = array('page1.txt', 'page2.txt', 'page3.txt');
   if (in_array($_POST['page'], $valid_pages)) {
      $content = file_get_contents($_POST['page']);
   }
   else {
      $content = 'No page selected.';
   }
}
// always display the form
echo '<form name="view_page" action="'.$_SERVER['PHP_SELF'].'" method="POST">
Page: <input type="text" name="page" /> <input type="submit" value="Get Page" /></form>
<hr />';
// echo content of page
echo $content;
?>

^ Something like that could work.

[mbrown174]

Sorry I wasnt being very clear. Essentially I have a form that a person can fill in. It consists of a text area and 2 submit buttons. One updates the webpage, the other shows a preview of what the page would look like once updated.

I wanted the content of the textarea copied across to a file called preview.txt, this would then be opened using fopen in the preview.php page.

Preview.php would be displayed on clicking the preview button.

I hope that wasnt too confusing 🙂

What im having difficulty with is the echo command - it just doesnt work. I keep getting error messages!

[leatherback]

Hm.. seems like a bit of a cumbersome way of doing it -going through a preview.txt file-; if you have the data in your posted data, why not use it. In any case..

Show a typical echo from your script that throws errors, and the errors it throws.