Constants in HEREDOC

[kkobashi]

Is it possible to specify constants in a heredoc string?
For example, I want to print out the PHP_VERSION constant:

$test = "A test message";
$block = <<< BLOCK
<table>
<tr>
<td>
PHP_VERSION // is it possible with php syntax to expand this?
</td>
</tr>
<tr>
<td>
{$test} // curly brace is ok and expands
</td>
</tr>
</table>
BLOCK;

[laserlight]

No, since there is no way to differentiate a constant from a string literal in heredoc.