The highlight_string() function
outputs a syntax highlighted version of str using the colors defined in the
built-in syntax highlighter for PHP.
If the second parameter
return is set to
TRUE then highlight_string()
will return the highlighted code as a string instead of
printing it out. If the second parameter is not set to TRUE then
highlight_string() will return
TRUE on success,
FALSE on failure.
注: The return parameter became available in PHP 4.2.0. Before this time it behaved like the default, which is FALSE
See also highlight_file(), and
show_source().