You likely have an unclosed single or double quote above that line in your code.  
What is the b that's outside of the quotes?
If it's a comparison, it could be something like:
if($bom != "b\xEF\xBB\xBF")
{
 //code
}
Simple code to reproduce this error in PHP:
<?php
$arg = "'T';                      //this unclosed double quote is perfectly fine.
$vehicle = ( $arg == 'B' ? 'bus' : 'not a bus');
print $vehicle . "\n";            //error is thrown on this line.  
?>
Run this, it prints an error:
PHP Parse error:  syntax error, unexpected T_NS_SEPARATOR in 
/var/www/sandbox/eric/code/php/run08/a.php on line 6