Errors installing Composer

[NasKar]

I'm trying to install Composer by following the directions in the Command-line installation. When I run

php composer-setup.php

I get these errors:

Some settings on your machine make Composer unable to work properly.
Make sure that you fix the issues listed below and run this script again:

The filter extension is missing.
Install it or recompile php without --disable-filter

The iconv OR mbstring extension is required and both are missing.
Install either of them or recompile php without --disable-iconv

If you could, please give me explicit direction on how to fix it. Thanks for your time.

 

[SirDice]

Apparently you're missing security/php56-filter and converters/php56-iconv and/or converters/php56-mbstring (Assuming you have PHP 5.6, adjust accordingly).

 

[ondra_knezour]

You may also find the devel/php-composer port useful.

 

[NasKar]

I needed to:

pkg install php-composer
composer install

Thanks for the help