PLEASE HELP! Need to redirect only ONE time if javascript=off

ShadowIce · February 7, 2010

I can't get this code to stop redirecting more than one time if javascript is off

<?php
ob_start();
?>
<noscript>
<?php
header('Location: enable-javascript.php');
?>
</noscript>
<html>
<head><title>Test</title></head>
<body>
blah
</body>
</html>

and dont tell me to use metas because they redirect WAY too slow even if i set it to 0. the whole point is to keep the user from seeing index.php at all if js is off

teamatomic · February 7, 2010

Something like this should work.

<?php
session_start();
ob_start();
?>
<noscript>
<?php
if ($_SESSION['redirect'] != 'no')
{
$_SESSION['redirect']='no';
header('Location: enable-javascript.php');
}

?>

HTH

Teamatomic

premiso · February 7, 2010

This is not possible with PHP what you are trying to do. As PHP will execute the code inside the <noscript> tag since it does not recognize or execute javascript. PHP simply processes code at the server level then gives the display to the browser for interpretting which is where it will be detected if Javascript is off.

http://www.inspirationbit.com/php-js-detection-of-javascript-browser-settings/

Is one way of doing it. I am sure there are tons of different ways like that to do it. But using that script I would do as team has suggested and set a session variable once you figure out if JS is on instead of having every page constantly testing by echoing out a form. That is only needed once.

ShadowIce · February 7, 2010

this is what i have, and it still wont work:

index.php:

<?php
session_start();
ob_start();
?>
<noscript>
<?php
if ($_SESSION['redirect'] !== false)
{
$_SESSION['redirect']=false;
header('Location: enable-javascript.php');
}
?>
</noscript>

premiso · February 7, 2010

This is not possible with PHP what you are trying to do.

You seem to ignore and not read anything I write to you, good luck with this.

ShadowIce · February 7, 2010

premiso, i dont ignore u.

i just like teamatomic's idea better no offense

Buddski · February 7, 2010

The problem is.. you need the browser to load FIRST before you can determine whether or not JS is enabled..

You cannot get PHP which is server side to redirect on knowledge acquired via client side data..It just wont happen..

Unless SOMETHING tells PHP that JS is OFF

You would need a bridging page of sorts that tests for JS and passes a value to PHP to let it know that Js is disabled..

ShadowIce · February 7, 2010

would this help?

if (isset($_POST['jstest'])) {
  $nojs = FALSE;
  } else {
  // create a hidden form and submit it with javascript
  echo '<form name="jsform" id="jsform" method="post" style="display:none">';
  echo '<input name="jstest" type="text" value="true" />';
  echo '<script language="javascript">';
  echo 'document.jsform.submit();';
  echo '</script>';
  echo '</form>';
  // the variable below would be set only if the form wasn't submitted, hence JS is disabled
  $nojs = TRUE;
}
if ($nojs){
  //JS is OFF, do the PHP stuff
}

ShadowIce · February 7, 2010

here's what i have:

index.php:

<?php
ob_start();
?>
<?php
if (isset($_POST['jstest'])) {
  $nojs = FALSE;
  } else {
  // create a hidden form and submit it with javascript
  echo '<form name="jsform" id="jsform" method="post" style="display:none">';
  echo '<input name="jstest" type="text" value="true" />';
  echo '<script language="javascript">';
  echo 'document.jsform.submit();';
  echo '</script>';
  echo '</form>';
  // the variable below would be set only if the form wasn't submitted, hence JS is disabled
  $nojs = TRUE;
}
if($nojs){
header('Location: enable-javascript.php');
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><title>test</title>
<body>
blah
</body>
</html>
<?php
ob_end_flush();
?>

Buddski · February 7, 2010

Have you tested it? That may work but there is only one way to find out...

ShadowIce · February 7, 2010

yes i tested it. no it didnt work

for some reason its a blank page when i try to use it oO

idk why

ShadowIce · February 7, 2010

idk what went wrong.

it looks right to me

teamatomic · February 7, 2010

I went to the link premiso suggested and I like that solution. I use a cookie set/check on some sites and am going to switch the code over to the js sent form.

shadowice:

stop and think about it. You get a blank page; you have js turned on...it works. Add an else to the if and see what happens

if($nojs){
header('Location: enable-javascript.php');
}
else {echo "JS is on";}

HTH

Teamatomic

ShadowIce · February 7, 2010

that else statement didnt work.

i right clicked the page, and i cant even see my mouse menu

but when i take the code out, i can see menu

ShadowIce · February 7, 2010

what could be stopping my menu AND making it blank?

teamatomic · February 7, 2010

omit the output buffering and see what happens.

HTH

Teamatomic

teamatomic · February 7, 2010

I used this:

<?php
if (isset($_POST['jstest'])) {
  $nojs = FALSE;
  } else {
  // create a hidden form and submit it with javascript
  echo '<form name="jsform" id="jsform" method="post" style="display:none">';
  echo '<input name="jstest" type="text" value="true" />';
  echo '<script language="javascript">';
  echo 'document.jsform.submit();';
  echo '</script>';
  echo '</form>';
  // the variable below would be set only if the form wasn't submitted, hence JS is disabled
  $nojs = TRUE;
}
if ($nojs){
  echo "NO JS";
}
else
{
echo "YES JS";
}
?>

and checked it by turning JS on/off via the mozilla addon webdeveloper, and it does work as advertised.

HTH

Teamatomic

ShadowIce · February 7, 2010

and now its returning YES JS even if js is off.

teamatomic · February 7, 2010

Then you have something else going on. How are you switching JS on and off?

HTH

Teamatomic

ShadowIce · February 7, 2010

By going to the tools menu in IE

teamatomic · February 7, 2010

Have you checked that JS is actually being switched on/off. Go to a JS repository and try to run a js example to test if its really off.

HTH

Teamatomic

ShadowIce · February 7, 2010

yea its off alright

when i turn off jscript and click 'run code' it doesnt run the code

http://writecodeonline.com/javascript

greatstar00 · February 7, 2010

shadowice, tell us what exactly u did

all steps u did

dont miss anything

ShadowIce · February 8, 2010

I went to repository, typed in document.write('hello world'); turned off js and the button didnt work

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PLEASE HELP! Need to redirect only ONE time if javascript=off

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