# XDebug

- XDebug uses the DBGP protocol

```sh
dnf install php82-php-pecl-xdebug3
```

`/etc/php.d/90-xdebug.ini`

```ini
[XDebug]
zend_extension=/opt/remi/php82/root/usr/lib64/php/modules/xdebug.so
xdebug.remote_enable=1
xdebug.remote_autostart=1
xdebug.mode=develop,gcstats,coverage,profile,debug
xdebug.client_host=localhost
xdebug.client_port=9003
xdebug.idekey="NVIM"
xdebug.log=/tmp/xdebug.log
xdebug.log_level = 7

; always initiate a debugging session
xdebug.start_with_request=yes

; activates if a "trigger" is present
;xdebug.start_with_request=trigger
```

`php -v`

```
PHP 8.2.12 (cli) (built: Oct 24 2023 19:22:16) (NTS gcc x86_64)
Copyright (c) The PHP Group
Zend Engine v4.2.12, Copyright (c) Zend Technologies
    with Zend OPcache v8.2.12, Copyright (c), by Zend Technologies
    with Xdebug v3.2.2, Copyright (c) 2002-2023, by Derick Rethans
```

Show current settings

```sh
php -r 'xdebug_info();'
```

## Adapter

```sh
cd ~
git clone https://github.com/xdebug/vscode-php-debug.git
cd vscode-php-debug
npm install && npm run build
```

Debug adapter nvim plugin

`:MasonInstall php-debug-adapter`

Debug chrome plugin

(https://chrome.google.com/webstore/detail/xdebug-helper/eadndfjplgieldjbigjakmdgkmoaaaoc)

to trigger debugger send the cookie `XDEBUG_SESSION=XDEBUG_ECLIPSE; Path=/; Expires=Sat, 27 Jul 2024 08:17:10 GMT;`

`.local/share/nvim/mason/packages/php-debug-adapter/extension/package.json`

```json
"port": {
    "type": "number",
    "description": "Port on which to listen for Xdebug",
    "default": 9003
},
"php.debug.ideKey": {
    "type": "string",
    "default": "vsc",
    "description": "A unique key that allows the proxy to match requests to your editor. Only used when proxy configuration includes replacement.",
    "scope": "machine-overridable"
}
```


## Trigger


Xdebug will initiate a debug session in the presence of the XDEBUG_SESSION HTTP cookie.

You can pick any value for the cookie, unless xdebug.trigger_value is set.

A typical header looks like:

```
Cookie: XDEBUG_SESSION=start
```

To signal the debugger to initiate connections, Xdebug will look whether the XDEBUG_SESSION environment variable is present.

```
export XDEBUG_SESSION=1
```

Watch the logs

```sh
tail -f /tmp/xdebug.log 
```


### Test

```sh
php --info
```

`https://github.com/banago/simple-php-website`

### debug

- port 9003 must not been blocked