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

ShadowIce

By ShadowIce
in PHP Coding Help

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ShadowIce Member

ShadowIce

Posted
Posted

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 Newbie

teamatomic

Posted
Posted

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 Regular Member

premiso

Posted
Posted

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 Member

ShadowIce

Posted
  • Author
Posted

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>

 

 

Buddski Newbie

Buddski

Posted
Posted

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 Member

ShadowIce

Posted
  • Author
Posted

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 Member

ShadowIce

Posted
  • Author
Posted

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();
?>

teamatomic Newbie

teamatomic

Posted
Posted

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

teamatomic Newbie

teamatomic

Posted
Posted

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

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