h1 <beginfold id='1'>{</beginfold id='1'>
    text-color: "red";
<endfold id='1'>}</endfold id='1'>

<beginfold id='3'>/*</beginfold id='3'> PHP code, invalid in CSS context <endfold id='3'>*/</endfold id='3'>
for() 

<?php echo("hello"); 

// valid code in PHP context
for()

?>

h2 <beginfold id='1'>{</beginfold id='1'>
    text-weight: bold;
<endfold id='1'>}</endfold id='1'>

