Edit report at https://bugs.php.net/bug.php?id=62745&edit=1

 ID:                 62745
 User updated by:    kjelkenes at gmail dot com
 Reported by:        kjelkenes at gmail dot com
 Summary:            Extend echo and print possiblity
 Status:             Wont fix
 Type:               Feature/Change Request
 Package:            Output Control
 Operating System:   *
 PHP Version:        5.4.5
 Block user comment: N
 Private report:     N

 New Comment:

Before you blatantly ignore this bug report, please take your time to read the 
following posts:

- http://fabien.potencier.org/article/34/templating-engines-in-php ( Security )
- http://pkj.no/blog/2012/08/08/php-use-a-template-system-or-not


And the most important rule of XSS prevention (right now):

" Don't forget to add htmlspecialchars($var, ENT_QUOTES, 'utf-8') on every 
single echo statement "


Previous Comments:
------------------------------------------------------------------------
[2012-08-06 18:59:35] kjelkenes at gmail dot com

Just stating the obvious.

OOP, MVC, Templating engine, you sir have greatly missed the point of this 
feature request.
 
Are you talking about OOP? OOP has _nothing_ to do with this question, of 
course you would use OOP: classes, namespaces and traits.. But this is not the 
place to talk about OOP design.
 
Are you talking about MVC? Because this addition will make every currently 
existing MVC frameworks such as Symfony 2 and Codeigniter more secure. 


You separate controller / business logic / presentation logic, but you are now 
starting a discussion of using a 3rdparty library against php itself as a 
templating-engine. Does not really make sense at all regarding this feature 
request. 

You don't USE a templating framework if you implement this change, this change 
will make it easier then never to CREATE the fastest templating engine on the 
market without having to parse code to php code and then use the php code to 
make php safe. Note, php is a language, you can also template with it because 
of it's easy syntax HTML<?php echo $var?>MORE_HTML.


In Symfony 2 you have to either use 

- TWIG syntax (Templating engine)
- echo $this->escape("<script></script"); ( Symfony way .. )


Now, this didn't have to be needed if this feature request was implemented.

- echo "<script>.."; ( This is not possible at this time )

------------------------------------------------------------------------
[2012-08-06 18:27:49] phpmpan at mpan dot pl

When making general statements, first make sure that by writing "all people do" 
you don't mean "I do". Also please take a look at the calendar. Mine says 2012, 
not the end of XX century. Maybe 10 years ago it was acceptable, but it's no 
longer a good habit to mix business logic and presentation layer, virtually any 
bigger application is written in OOP (which doesn't mix well with exiting PHP 
mode) and the presentation layer is handled by template engines or frameworks.

As I said before: you're trying to solve a problem that doesn't really exist. 
If it can be observed anywhere, it's just a symptom of a different problem that 
lies between keyboard and chair, not in PHP.

Also it's not a good idea to call PHP devs ignorants and raging because your 
idea is not accepted. If you believe that it's really needed, try to convince 
people it is so! Insulting will not get you anywhere.

------------------------------------------------------------------------
[2012-08-06 13:07:30] kjelkenes at gmail dot com

Ignorance, gotta love it. There is really a difference of output buffering 
functions and this, I do of course know of the output buffering functions, this 
is NOT RELATED. Read on to really see what I mean about this.



This is how people in most cases write their VIEW logic. Meaning ending and 
starting <?php echo ..?> every time they echo stuff.. That also means you 
should ESCAPE ALL data that comes to echo, else you are just not SAFE. 


index.php:


<?php
  // Web page title.
  $title = 'My website';
  // A item from the database.
  $item = array('title' => '<script>alert("Hi!")</script>');
?>

<?php ob_start() ?>
<html>
        <head>
                <title><?php echo $title?></title>
        </head>
        <body>
                <div><p><?php echo $item['title']?></p></div>
        </body>
</html>
<?php
$content = htmlspecialchars(ob_get_flush(),ENT_QUOTES,'UTF-8');
echo $content;

/*  Returns:
&lt;html&gt;
        &lt;head&gt;
                &lt;title&gt;My website&lt;/title&gt;
        &lt;/head&gt;
        &lt;body&gt;
                
&lt;div&gt;&lt;p&gt;&lt;script&gt;alert(&quot;Hi!&quot;)&lt;/script&gt;&lt;/p&gt;&lt;/div&gt;
        &lt;/body&gt;
&lt;/html&gt;


FAIL?! We NEED a echo handler....
*/
?>




Obviously this won't work if people wrote their template like this (but that's 
up to them...):


index.php

echo "
<html>
        <head>
                <title>{$title}</title>
        </head>
        <body>
                <div><p>{$item['title']}</p></div>
        </body>
</html>
";



This is wanted behaviour (The use of htmlspecialchars wouldn't be necessary if 
we had a handler that intercepted the echo statement.):


<?php
  // Web page title.
  $title = 'My website';
  // A item from the database.
  $item = array('title' => '<script>alert("Hi!")</script>');
?>

<html>
        <head>
                <title><?php echo 
htmlspecialchars($title,ENT_QUOTES,'UTF-8')?></title>
        </head>
        <body>
                <div><p><?php echo 
htmlspecialchars($item['title'],ENT_QUOTES,'UTF-8')?></p></div>
        </body>
</html>
<?php

/*  Returns:
<html>
        <head>
                <title>My website</title>
        </head>
        <body>
                
<div><p>&lt;script&gt;alert(&quot;Hi!&quot;)&lt;/script&gt;</p></div>
        </body>
</html>


Perfect!
*/
?>

------------------------------------------------------------------------
[2012-08-06 01:01:42] ahar...@php.net

The commenters are right: output buffering already deals with the feature as 
requested, and as Laruence points out, the taint extension is available for the 
underlying issue if you want to go down that road.

Closing.

------------------------------------------------------------------------
[2012-08-05 06:55:18] larue...@php.net

1. if you want taint mode, refer to : http://pecl.php.net/taint
2. if you want escape output: refer to http://www.php.net/manual/en/function.ob-
start.php

thanks

------------------------------------------------------------------------


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