Brainfuck Interpreter

This script will interpret brainfuck within PHP.

Example

$parser = new Parser();

$parser->run("+++++++++ [-]");

// or to run a file

$parser->runFile($file);

// to modify the starting memory (to start with a custom one) do

$memory = new Memory();
$parser = new Parser($memory);

$result = $parser->run("[>[>+>+<<-]>>[<<+>>-]<<<-]");

Specification

Character	C equivalent	Meaning
>	++ptr;	increment the data pointer (to point to the next cell to the right).
<	--ptr;	decrement the data pointer (to point to the next cell to the left).
+	++*ptr;	increment (increase by one) the byte at the data pointer.
-	--*ptr;	decrement (decrease by one) the byte at the data pointer.
.	putchar(*ptr);	output the byte at the data pointer.
,	*ptr = getchar();	accept one byte of input, storing its value in the byte at the data pointer.
[	while (*ptr) {	if the byte at the data pointer is zero, then instead of moving the instruction pointer forward to the next command, jump it forward to the command after the matching ] command.
]	}	if the byte at the data pointer is nonzero, then instead of moving the instruction pointer forward to the next command, jump it back to the command after the matching [ command.

Source: Wikipedia