此功能终于通过RFC通过php 7.3登陆:灵活的Heredoc和Nowdoc语法

Thank goodness this feature has finally landed in php 7.3 via RFC: Flexible Heredoc and Nowdoc Syntaxes

因此，您的示例现在可以清楚地写为:

So now your example can cleanly be written as:

class myclass
{
    function __construct()
    {
        $a = some_code();
        $b = some_more_code();
        $x = <<<EOT

        line1
        line2
        line3
        line4

        EOT;

        $c = even_more_code();
        $b = still_more_code();
    }
}