PHP Syntax highlight doesn't handle {$variables} in double-quoted strings

[alexr00]

Description

PHP Syntax highlight doesn't handle {$variables} in double-quoted strings.

Steps to Reproduce

1. Write this in a PHP file:

<?php

$array = ['x' => 'y'];

$string = "Lorem ipsum {$array['x']}";

Expected behavior: In the above code in PHP, the chunk {$array['x']} is expanded into the value of what's inside the {}, which is an element of the array.
The braces should be somehow highlighted, and $array['x'] shoould be highlighted in a way similar to how array elements are highlighted outside of a string: with the array name, brackets, and index highlighted in different colors.

Actual behavior: It is highlighted like this:

as if

• the braces were just part of the string,
• only the variable $array itself were expanded, and
• the portion ['x'] were again just part of the string

Reproduces how often: always

Versions

VS Code 1.84.2

Additional Information

Originally from @php4fan in microsoft/vscode#199790