ldap-dn | LDAP DN parsing and manipulation library for PHP

As mentioned in the Speech to Text API docs,

You cannot use JavaScript to call the WebSocket interface from a browser. The watson-token parameter that is available with the /v1/recognize method does not accept IAM tokens or API keys. For information about working around this limitation, see the Release notes.

Here's the known limitation,

The Speech to Text service has the following known limitation.

Service instances that use IAM authentication cannot currently use JavaScript to call the Speech to Text WebSocket interface. This limitation applies to any application (such as the service demo) that uses JavaScript to make WebSocket calls from a browser. WebSocket calls that are made with other languages can use IAM tokens or API keys. To work around this limitation, you can do the following:

Call the WebSocket interface from outside of a browser. You can call the interface from any language that supportsthe WebSockets. Refer to information in The WebSocket interface for guidance when working with another language.

The Watson SDKs provide the simplest way to call the WebSocket interface from another language. The SDKs accept an API key and manage the lifecycle of the tokens. For information about using the WebSocket interface with the Node.js, Java, Python, and Ruby SDKs, see the API reference.

Use the synchronous or asynchronous HTTP interfaces to perform speech recognition.

If you have an old Speech to Text service with cloud foundry credentials (username and password), you can make a Curl request for the watson-token like this