It arrives as one line, from a tag or from PHP.
The snippet catches uncaught errors and unhandled rejections. The PHP class reports an exception you pass it, including the lines around the crash and the previous exception. You can attach a release, a user, and breadcrumbs. Nothing is read from your repository.
// POST /api/<public-key>/store { "type": "TypeError", "value": "Cannot read properties of undefined (reading 'total')", "url": "https://shop.example/checkout?step=card", "release": "shop@1.4.2", "user": "u_84213", "trace": "9f2c4e1b…ab31", "frames": 11 }