increase variable in Heredoc

[till]

Hi!

how can i increase a variable in a php Heredoc?

i want a user to change text-size.

in site.css.php:

h1 {
font-size : $text_size + 1$px;
}

Code:

<?php
header("Content-type: text/css");

require_once('../CMS/config.inc.php');

$text_size = $_SESSION['text_size'];
$px = 'px';

   $str = <<<DEMO

h1 { 
font-size : $text_size + 1$px; 
}

DEMO;
 
   echo $str;
?>

and on index.php:

Code:

<?php
 if(session_is_registered('text_size') ){
   
          if(isset($_GET[size_plus])){
  
     $_SESSION['text_size'] = $_SESSION['text_size'] + 2;
  
  
  }
  
          if(isset($_GET[size_minus])){
  
     $_SESSION['text_size'] = $_SESSION['text_size'] - 2;
  
  
  }
   
   
   }else{
   
   $_SESSION['text_size'] = '10';
   
   }


echo '<a class="normlink" href=" $_SERVER['PHP_SELF'] ?size_plus">plus</a> | <a class="normlink" href=" $_SERVER['PHP_SELF'] ?size_minus">minus</a>';
?>

i cant get this working in site.css.php:

h1 {
font-size : $text_size + 1$px;
}


when i look at the html-sorce in my browser it prints:
....
font-size : 10 + 1px;   // (exactly this)
....

i also tried it with brackets and points and quotes without success.

it doesnt encrease the the variable

thanks for helping.
till.

[Ronald Wernecke]

your size value is stored as string - so you have to convert it to a integer value.

Use

Code:

$textsize=intval($_SESSION['text_size'])+1;

and

Code:

echo "h1{\nfont-size : ".$textsize." px\n}";