    Backticks as an alias for shell_exec() are deprecated

Used that a lot in shell scripts. using php-cli.

like in `mkdir $dirname`;

▲ pabs3 3 hours ago | parent [-]

That is an anti-pattern, since it suffers from shell meta-character injection (and argument injection). Since PHP has mkdir, you should use that instead. And pcntl_exec() is the correct API for running processes.

	▲	dgb23 11 minutes ago \| parent [-]
		Typical users of this likely don't care the slightest about whether anyone considers it an anti-pattern, because you use those in order to write utility scripts. And those who care would use tooling to detect issues like that anyways.