[Bug] Code validation (syntax error) does not work for php language

Reproducible in vscode.dev or in VS Code Desktop?

• Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

• Not reproducible in the monaco editor playground

Monaco Editor Playground Link

No response

Monaco Editor Playground Code

<?php
// The next line contains a syntax error:
if () {
  return "The parser recovers from this type of syntax error"
}
?>

Reproduction Steps

Write a syntax error, like missing condition in if statement or missing a ;

Actual (Problematic) Behavior

Code validation (syntax error) does not work for php language

It does not work in demo either (microsoft.github.io/monaco-editor)

If you select PHP language, the first comment is "the next line contains a syntax error". But the "next line" (which has a syntax error) is not highlighted

Expected Behavior

Code validation works

Additional Context

No response

Start by reproducing the PHP snippet in the Monaco Editor Playground and the Monaco Editor demo, then trace how PHP syntax errors are validated and highlighted. Done means errors such as an empty if condition or missing semicolon are detected and visibly reported in both reproduction environments.