I am trying to remove JavaScript from the HTML.

I can't get the regular expression to work with PHP; it's giving me an null array. Why?

<?php

$var = '

<script type=text/javascript> 

function selectCode(a) 

{ 

   var e = a.parentNode.parentNode.getElementsByTagName(PRE)[0]; 

   if (window.getSelection) 

   { 

      var s = window.getSelection(); 

       if (s.setBaseAndExtent) 

      { 

         s.setBaseAndExtent(e, 0, e, e.innerText.length - 1); 

      } 

      else 

      { 

         var r = document.createRange(); 

         r.selectNodeContents(e); 

         s.removeAllRanges(); 

         s.addRange(r); 

      } 

   } 

   else if (document.getSelection) 

   { 

      var s = document.getSelection(); 

      var r = document.createRange(); 

      r.selectNodeContents(e); 

      s.removeAllRanges(); 

      s.addRange(r); 

   } 

   else if (document.selection) 

   { 

      var r = document.body.createTextRange(); 

      r.moveToElementText(e); 

      r.select(); 

   } 

} 

</script>

';



   function remove_javascript($java){

   echo preg_replace('/<scriptb[^>]*>(.*?)</script>/i', , $java);



   }    

?>