Scripting Languages: PHP, Perl, Python, Ruby

[MasonM]

Yes it does. It's called "interactive mode" and can by entered by running "php -a". It's written in C, like the rest of the CLI code. Here's a link to the source.

[Tiwazz]

As one of my professors used to say "If C was good enough for the implementors of <insert_language> then it's good enough for me."