<?php
function sanitize_output($buffer) {
$search = array(
'/\>[^\S ]+/s', // strip whitespaces after tags, except space
'/[^\S ]+\</s', // strip whitespaces before tags, except space
'/(\s)+/s' // shorten multiple whitespace sequences
);
$replace = array(
'>',
'<',
'\\1'
);
$buffer = preg_replace($search, $replace, $buffer);
return $buffer;
}
ob_start("sanitize_output");
/* regular html is started from here */
?>
<!DOCTYPE html>
<html>
<head>
<title>Test page<title>
</head>
<body>
<h1>Welcome!</h1>
</body>
</html>