Vscode remote debugging PHP solution through remotessh and Xdebug

install remotessh

Configure the remote server connection secret key for login

Host ubuntu
  HostName 192.168.0.1
  User root
  Port 22
  IdentityFile "C:\Users\xxx"

install phpdebug

Create in the root directory of the current debugging project
.vscode/launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Listen for XDebug",
            "type": "php",
            "request": "launch",
            "port": 9003, //  It must be connected with the remote server php.ini xdebug.remote_port=9003  The settings are consistent 
        },
    ]
}

Remote server installation xdebug php expand

Official guidance https://xdebug.org/docs/install
Such as ：
Ubuntu (18.04 LTS/Bionic, 20.04 LTS/Focal):
sudo apt-get install php-xdebug

modify php.ini Configuration activation xdebug Remote debugging

zend_extension = xdebug.so Location 
[xdebug]
xdebug.remote_port=9003 //  With the local vscode .vscode/launch.json port bring into correspondence with 
xdebug.remote_enable = 1
xdebug.remote_autostart = 1
xdebug.mode=debug
xdebug.start_with_request=yes
xdebug.discover_client_host=On
max_execution_time = 3600