blackfire:tldr:308db

The command blackfire agent --socket="${tcp:--127-0-0-1:8307}" is used to start the Blackfire agent with a specific socket address and port number.

Here is a breakdown of the command:

• blackfire agent: This is the command to start the Blackfire agent service.
• --socket=...: This option specifies the socket address and port for the Blackfire agent to listen on.
• ${tcp:--127-0-0-1:8307}: This is a reference to a specific socket address and port. In this case, it uses the tcp protocol, with a fallback value of 127.0.0.1:8307.

The tcp:--127-0-0-1:8307 part can be further explained as follows:

• tcp: This indicates the use of the TCP protocol for communication.
• --127-0-0-1: This specifies the IP address to bind the socket to, in this case, 127.0.0.1, which is the loopback address or localhost.
• :8307: This specifies the port number to use, which in this case is 8307.

Overall, the command starts the Blackfire agent and binds it to the loopback address on port 8307, allowing it to listen for incoming requests through that socket.