just like the title says. CANNOT use Compose/Packagist/Whatever because the system is air-gapped and does not have access to internet, nor will it ever. also, this is not this.
need a solution that can log PHP messages/data to console WITHOUT using echo/print or anything else that uses the php://stdout which dirupts JSON exchanges with internal server. there used to be a Monolog implementation that did this, but haven’t been able to locate it and current Monolog deployment is all via Composer. this must be a STATIC install using basic include and require.
if there is such a beast, please reply. not interested in opinions on the operational constraints, so please do not post them. only interested in a solution that meets the criteria.
if this is the wrong exchange for this question, kindly point to the correct one. thank you.