php: Respect LSP settings for Intelephense (#14806)

This PR updates the PHP extension with support for reading LSP settings
when using Intelephense as the language server.

Addresses #4258.

Release Notes:

- N/A

extensions/php/src/php.rs

@@ -1,6 +1,6 @@
 mod language_servers;
 
-use zed_extension_api::{self as zed, LanguageServerId, Result};
+use zed_extension_api::{self as zed, serde_json, LanguageServerId, Result};
 
 use crate::language_servers::{Intelephense, Phpactor};
 
@@ -39,6 +39,23 @@ impl zed::Extension for PhpExtension {
             language_server_id => Err(format!("unknown language server: {language_server_id}")),
         }
     }
+
+    fn language_server_workspace_configuration(
+        &mut self,
+        language_server_id: &LanguageServerId,
+        worktree: &zed::Worktree,
+    ) -> Result<Option<serde_json::Value>> {
+        match language_server_id.as_ref() {
+            Intelephense::LANGUAGE_SERVER_ID => {
+                if let Some(intelephense) = self.intelephense.as_mut() {
+                    return intelephense.language_server_workspace_configuration(worktree);
+                }
+            }
+            _ => (),
+        }
+
+        Ok(None)
+    }
 }
 
 zed::register_extension!(PhpExtension);