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

[php4fan]

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.84.2
• OS Version: Manjaro Linux

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.

Observed 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

[lszomoru]

@jrieken, could you please help with triaging this issue? Thank you!

[alexr00]

Moved to KapitanOczywisty/language-php#15