The following code snippet is valid PHP, but XHPAST cannot parse it. Specifically, the following error is raised: XHPAST Parse Error: syntax error, unexpected T_STRING, expecting ',' or ';' on line 8.

<?php

$user = array(
  'id'   => 123,
  'name' => 'Joe Bloggs',
);

echo "'{$user["name"]}'";

The issue here is that double quotes are nested within an expression that is nested within double quotes. The following modification to the source will parse correctly:

-echo "'{$user["name"]}'";
+echo "'{$user['name']}";