[PHP] BrainF*ck interpreter

[luruke]

it's an interpreter (by me) of brainf*uck code.
(brainf*uck is an esoteric programming languages)

<?php

function brainfuck($code){
        
        $out = '';
        
                for($a=array(),$p=0,$l=array(),$i=0; $i<strlen($code); $i++){
            
                        if(!$code[$i]) continue;
                
                
                        switch($code[$i]){
                
                            case         '>':    $p++;
                                                break;
                    
                            case         '<':     $p--;
                                                break;
                                        
                            case        '+':    $a[$p]++;
                                                break;
                            
                            case        '-':    $a[$p]--;
                                                break;
                            
                            case        '[':    $l[] = $i;
                                                break;
                            
                            case        ']':    if($a[$p]>0)
                                                        $i=$l[sizeof($l)-1];
                                                else
                                                        array_pop($l);
                                                break;
                            
                            case        ',':    $c = trim(fgets(STDIN));
                                                $a[$p] = ord($c[0]);
                                                break;
                            
                            case        '.':    $out.=chr($a[$p]);
                                                break;
                        }
                }

    return $out;                            
}


print brainfuck(">+++++++[<+++++++++>-]<+++.>+++++[<++++++++++>-]<--.>+++++[<--->-]<--.
                 ++++++++.+++++.>++++[<---------->-]<.>+++++[<++++++++++>-]<---.>+++[<------>-]<.
                 ++++++++.>+++++[<--------------->-]<.>++++[<++++++++++>-]<+.
                 >++++++++[<+++++>-]<---.++++++.>+++++[<--->-]<.>++++++[<++>-]<+.
                 --.++.>++++++[<-->-]<-.>++++++[<++>-]<+++.>++++++[<-->-]<---.
                 >++++++[<++>-]<+.>++++++++[<---------->-]<--.>+++++++[<++++++++++>-]<+++.
                 +++++.>++++++++[<---------->-]<++.>+++++[<+++++++++>-]<+++.
                 >+++[<--->-]<+.>+++[<+++>-]<-.[-]++++++++++.");
?>

bash-3.2$ time php brainfuck.php
BrainFuck Interpreter in PHP

real 0m0.032s
user 0m0.021s
sys 0m0.009s

[Jordan]

Moved to the code section. First interpreter I've seen in PHP. Thanks for the share!

[Brandon W]

What is this ment to do?

[luruke]

What is this ment to do?

is a brainfuck interpreter, run the brainfuck codes!
check brainfuck on wikipedia or google

[Brandon W]

OK I will later, I see the results but what does it actually do?

[TkTech]

What do you mean...it runs brainfuck code....its essentially a language with only pointer functions and stdin/stdout...

[Brandon W]

Oh. If someone said that brainfuck was a language, I would of understood