You should read the proto3 language guide before reading this document. Note that the protocol buffer compiler currently only supports proto3 code generation for PHP. Compiler Invocation The protocol buffer compiler produces PHP output when invoked with the --php_out= command-line flag. The parameter to the --php_out= option is the directory where you want the compiler to write your PHP output. In order to conform to PSR-4, the compiler creates a sub-directory corresponding to the package def...
