iamrobert · December 1, 2019 20:32
diff --git a/template.php b/template.php
 <?php 
 function sanitize_output($buffer) {

  
                $x  = '<!--(?>-?[^-]*+)*?--!?>';
                $s1 = DOUBLE_QUOTE_STRING;
                $s2 = SINGLE_QUOTE_STRING;

                //Regex for escape elements
                $pr = "<pre\b[^>]*+>(?><?[^<]*+)*?</pre\s*+>";
                $sc = "<script\b[^>]*+>(?><?[^<]*+)*?</script\s*+>";
                $st = "<style\b[^>]*+>(?><?[^<]*+)*?</style\s*+>";
                $tx = "<textarea\b[^>]*+>(?><?[^<]*+)*?</textarea\s*+>";
                
                $rx = "#(?><?[^<]*+(?>$pr|$sc|$st|$tx|<!--\[(?><?[^<]*+)*?"
                                . "<!\s*\[(?>-?[^-]*+)*?--!?>|<!DOCTYPE[^>]++>)?)*?\K(?:$x|$)#i";
                $rx2 = "#(?>[^<]*+(?:$pr|$sc|$st|$tx|$x|<(?>[^>=]*+(?:=\s*+(?:$s1|$s2|['\"])?|(?=>)))*?>)?)*?\K"
                        . '(?:[\t\f ]++(?=[\r\n]\s*+<)|(?>\r?\n|\r)\K\s++(?=<)|[\t\f]++(?=[ ]\s*+<)|[\t\f]\K\s*+(?=<)|[ ]\K\s*+(?=<)|$)#i';

  
                  // remove ws around block elements preserving space around inline elements
                //block/undisplayed elements
                $b = 'address|article|aside|audio|body|blockquote|canvas|dd|div|dl'
                        . '|fieldset|figcaption|figure|footer|form|h[1-6]|head|header|hgroup|html|noscript|ol|output|p'
                        . '|pre|section|style|table|title|tfoot|ul|video';

                //self closing block/undisplayed elements
                $b2 = 'base|meta|link|hr';

                //inline elements
                $i = 'b|big|i|small|tt'
                        . '|abbr|acronym|cite|code|dfn|em|kbd|strong|samp|var'
                        . '|a|bdo|br|map|object|q|script|span|sub|sup'
                        . '|button|label|select|textarea';

                //self closing inline elements
                $i2 = 'img|input';
  
  
                  $rx3          = "#(?>\s*+(?:$pr|$sc|$st|$tx|$x|<(?:(?>$i)\b[^>]*+>|(?:/(?>$i)\b>|(?>$i2)\b[^>]*+>)\s*+)|<[^>]*+>)|[^<]++)*?\K"
                        . "(?:\s++(?=<(?>$b|$b2)\b)|(?:</(?>$b)\b>|<(?>$b2)\b[^>]*+>)\K\s++(?!<(?>$i|$i2)\b)|$)#i";
              
                $j = '<input type="hidden" name="[0-9a-f]{32}" value="1" />';

 
                //Remove additional ws around attributes
                $rx5          = "#(?>\s?(?>[^<>]*+(?:<!(?!DOCTYPE)(?>>?[^>]*+)*?>[^<>]*+)?<|(?=[^<>]++>)[^\s>'\"]++(?>$s1|$s2)?|[^<]*+))*?\K"
                        . "(?>\s\s++|$)#i";
                //Remove last whitespace in open tag
                $rx6          = "#(?>[^<]*+(?:$j|$x|<(?![a-z0-9]++))?)*?(?:<[a-z0-9]++(?>\s*+[^\s>]++)*?\K"
                        . "(?:\s*+(?=>)|(?<=[\"'])\s++(?=/>))|$\K)#i";

          

           
         
    $search = array(
      $rx,
      $rx2,
      $rx3,
     $rx5,
      $rx6
    );

    $replace = array(
      '',
      '',
      '',
    ' ',
      ''
    );

    $buffer = preg_replace($search, $replace, $buffer);

    return $buffer;
 }

 // Usage




 ob_start('sanitize_output');
 ?>


 <html>..............

 <?php 
 ob_end_flush();
  ?>
	<?php
	function sanitize_output($buffer) {


	$x = '<!--(?>-?[^-]+)?--!?>';
	$s1 = DOUBLE_QUOTE_STRING;
	$s2 = SINGLE_QUOTE_STRING;

	//Regex for escape elements
	$pr = "<pre\b[^>]+>(?><?[^<]+)?</pre\s+>";
	$sc = "<script\b[^>]+>(?><?[^<]+)?</script\s+>";
	$st = "<style\b[^>]+>(?><?[^<]+)?</style\s+>";
	$tx = "<textarea\b[^>]+>(?><?[^<]+)?</textarea\s+>";

	$rx = "#(?><?[^<]+(?>$pr\|$sc\|$st\|$tx\|<!--\[(?><?[^<]+)*?"
	. "<!\s\[(?>-?[^-]+)?--!?>\|<!DOCTYPE[^>]++>)?)?\K(?:$x\|$)#i";
	$rx2 = "#(?>[^<]+(?:$pr\|$sc\|$st\|$tx\|$x\|<(?>[^>=]+(?:=\s+(?:$s1\|$s2\|['\"])?\|(?=>)))?>)?)*?\K"
	. '(?:[\t\f ]++(?=[\r\n]\s+<)\|(?>\r?\n\|\r)\K\s++(?=<)\|[\t\f]++(?=[ ]\s+<)\|[\t\f]\K\s+(?=<)\|[ ]\K\s+(?=<)\|$)#i';


	// remove ws around block elements preserving space around inline elements
	//block/undisplayed elements
	$b = 'address\|article\|aside\|audio\|body\|blockquote\|canvas\|dd\|div\|dl'
	. '\|fieldset\|figcaption\|figure\|footer\|form\|h[1-6]\|head\|header\|hgroup\|html\|noscript\|ol\|output\|p'
	. '\|pre\|section\|style\|table\|title\|tfoot\|ul\|video';

	//self closing block/undisplayed elements
	$b2 = 'base\|meta\|link\|hr';

	//inline elements
	$i = 'b\|big\|i\|small\|tt'
	. '\|abbr\|acronym\|cite\|code\|dfn\|em\|kbd\|strong\|samp\|var'
	. '\|a\|bdo\|br\|map\|object\|q\|script\|span\|sub\|sup'
	. '\|button\|label\|select\|textarea';

	//self closing inline elements
	$i2 = 'img\|input';


	$rx3 = "#(?>\s+(?:$pr\|$sc\|$st\|$tx\|$x\|<(?:(?>$i)\b[^>]+>\|(?:/(?>$i)\b>\|(?>$i2)\b[^>]+>)\s+)\|<[^>]+>)\|[^<]++)?\K"
	. "(?:\s++(?=<(?>$b\|$b2)\b)\|(?:</(?>$b)\b>\|<(?>$b2)\b[^>]*+>)\K\s++(?!<(?>$i\|$i2)\b)\|$)#i";

	$j = '<input type="hidden" name="[0-9a-f]{32}" value="1" />';


	//Remove additional ws around attributes
	$rx5 = "#(?>\s?(?>[^<>]+(?:<!(?!DOCTYPE)(?>>?[^>]+)?>[^<>]+)?<\|(?=[^<>]++>)[^\s>'\"]++(?>$s1\|$s2)?\|[^<]+))?\K"
	. "(?>\s\s++\|$)#i";
	//Remove last whitespace in open tag
	$rx6 = "#(?>[^<]+(?:$j\|$x\|<(?![a-z0-9]++))?)?(?:<[a-z0-9]++(?>\s+[^\s>]++)?\K"
	. "(?:\s*+(?=>)\|(?<=[\"'])\s++(?=/>))\|$\K)#i";





	$search = array(
	$rx,
	$rx2,
	$rx3,
	$rx5,
	$rx6
	);

	$replace = array(
	'',
	'',
	'',
	' ',
	''
	);

	$buffer = preg_replace($search, $replace, $buffer);

	return $buffer;
	}

	// Usage




	ob_start('sanitize_output');
	?>


	<html>..............

	<?php
	ob_end_flush();
	?>
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