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PHP OOP Brainfuck Interpreter - Revision history
2026-05-05T17:29:58Z
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Admin: New page: <source lang="php"> <?php /* * PHP OOP Brainfuck Interpreter (No Debugger) * * @version 0.1 * @author "Ivan Lucian" <nophinity@gmail.com> * * @todo Add a debuger w/ breakpoints * @t...
2009-06-25T20:31:17Z
<p>New page: <source lang="php"> <?php /* * PHP OOP Brainfuck Interpreter (No Debugger) * * @version 0.1 * @author "Ivan Lucian" <nophinity@gmail.com> * * @todo Add a debuger w/ breakpoints * @t...</p>
<p><b>New page</b></p><div><source lang="php"><br />
<?php<br />
/*<br />
* PHP OOP Brainfuck Interpreter (No Debugger)<br />
*<br />
* @version 0.1<br />
* @author "Ivan Lucian" <nophinity@gmail.com><br />
*<br />
* @todo Add a debuger w/ breakpoints<br />
* @todo Add a profiler<br />
* @todo Optimize looping<br />
* @todo Fix EOF chr(0) problems<br />
* <br />
*/<br />
<br />
error_reporting(0);<br />
<br />
class Brainfuck {<br />
private $source;<br />
private $sourceIndex = 0;<br />
private $data = array();<br />
private $dataIndex = 0;<br />
private $input;<br />
private $inputIndex = 0;<br />
private $output = '';<br />
private $sourceLength;<br />
private $inputLength;<br />
<br />
public function __construct($source, $input = '', $flush = false) {<br />
$this->source = $source;<br />
$this->input = $input;<br />
$this->sourceLength = strlen($source);<br />
$this->inputLength = strlen($input);<br />
$this->data[0] = chr(0);<br />
$this->flush = $flush;<br />
}<br />
<br />
public function interpret() {<br />
$di =& $this->dataIndex;<br />
$si =& $this->sourceIndex;<br />
$sl =& $this->sourceLength;<br />
$ip =& $this->inputIndex;<br />
$il =& $this->inputLength;<br />
while (true) {<br />
switch ( $this->source{$this->sourceIndex} ) {<br />
case '+':<br />
$this->data[$di] = chr( ord($this->data[$di]) + 1 );<br />
break;<br />
case '-':<br />
$this->data[$di] = chr( ord($this->data[$di]) - 1 );<br />
break;<br />
case '>':<br />
$di++;<br />
if (!isset($this->data[$di])) $this->data[$di] = chr(0);<br />
break;<br />
case '<':<br />
if ($di == 0) break;<br />
$di--;<br />
break;<br />
case '.':<br />
if ($this->flush == true) <br />
echo $this->data[$di];<br />
else <br />
$this->output .= $this->data[$di]; <br />
break;<br />
case ',':<br />
$this->data[$di] = $ip == $il ? chr(0) : $this->input[$ip++]; <br />
break;<br />
case '[':<br />
if (ord($this->data[$di]) == 0 && $di != 0) {<br />
$brackets++;<br />
while ($brackets && $si++ < $sl) {<br />
if ($this->source[$si] == '[')<br />
$brackets++;<br />
elseif ($this->source[$si] == ']') <br />
$brackets--;<br />
}<br />
} else {<br />
$pos = $si++ - 1;<br />
if ($this->interpret()) <br />
$si = $pos;<br />
}<br />
break;<br />
<br />
case ']':<br />
return (ord($this->data[$di]) != 0);<br />
}<br />
<br />
if (++$si == $sl) break;<br />
}<br />
<br />
return $this->output;<br />
}<br />
<br />
<br />
}<br />
<br />
$code = <<< __EOF<br />
++++[>+++++<-]>+++<br />
[<br />
[>+>+<<-]<br />
>++++++[<+>-]+++++++++[<++++++++++>-]<br />
>[<+>-]<-<br />
]<br />
+++>+++++++++[<+++++++++>-]<br />
>++++++[<++++++++>-]<--[>+>+<<-]>>[<<+>>-]<--<br />
>>++++[<++++++++>-]++++++++++<br />
<br />
>+++++++++[>+++++++++++<-]><br />
[<br />
[>+>+>+<<<-]>[<+>-]>><br />
[<br />
[>+>+<<-]>>[<<+>>-]<<br />
[<->-[<->-[<->-[<->-[<->-[<->-[<->-[<->-[<->-[<<<+>---------->->[-]]]]]]]]]]]<<br />
]<br />
<<[>>++++++++++++[<++++<++++>>-]<<[.[-]>]<<]<br />
>[<++++++[>++++++++<-]>.[-]]<<<br />
<br />
<<<.<<<<<.[<]>>>>>>>>>.<<<<<..>>>>>>>>.>>>>>>>.<br />
<br />
[>]>[>+>+<<-]>[<+>-]>[-[[-]+++++++++[<+++++++++++++>-]<--.[-]>]]<<<br />
<br />
<<<.[<]>>>>>>>>>.>>>>>>>>>.[>]<<.<<<<<.<<<..[<]>>>>>>.[>]<<.<br />
[<]>>>>>>>>>.>.[>]<<.[<]>>>>.>>>>>>>>>>>>.>>>.[>]<<.<br />
[<]>.[>]<<<<<<.<<<<<<<<<<<..[>]<<<.>.<br />
<br />
[>]>[>+>+>+<<<-]>[<+>-]>><br />
[<br />
[>+>+<<-]>>[<<+>>-]<<br />
[<->-[<->-[<->-[<->-[<->-[<->-[<->-[<->-[<->-[<<<+>---------->->[-]]]]]]]]]]]<<br />
]<br />
<<[>>++++++++++++[<++++<++++>>-]<<[.[-]>]<<]<br />
>[<++++++[>++++++++<-]>.[-]]<<<br />
<br />
<<<.<<<<<.[<]>>>>>>>>>.<<<<<..>>>>>>>>.>>>>>>>.<br />
<br />
[>]>[>+>+<<-]>[<+>-]>[-[[-]+++++++++[<+++++++++++++>-]<--.[-]>]]<<<br />
<br />
<<<.[<]>>>>>>>>>.>>>>>>>>>.[>]<<.<<<<<.<<<..[<]>>>>>>.[>]<<<<.>>>.<br />
<br />
<<<<.<.<<<<<<<<<<.>>>>>>.[>]<<.[<]>>>>>>>>>.>.>>>>>>>>>.[>]<<.<br />
<<<<<<<.[<]>>>>>>>>>.[<]>.>>>>>>>>>.[>]<<.<<<<.<<<<<<<<<<<<<.[>]<<<<<<<<<.<br />
[>]<<.[<]>>>>>>>>.[>]<<<<<<.[<]>>>>>..[>]<<.<<<<<<<<<<<<.[<]>>>>.<br />
[>]<<.<<<<.[<]>>>>>>.>>>.<<<<<<.>>>>>>>.>>>>>>>>>>.[>]<<<.>.<br />
<br />
>>>-<br />
<br />
[>+>+>+<<<-]>[<+>-]>><br />
[<br />
[>+>+<<-]>>[<<+>>-]<<br />
[<->-[<->-[<->-[<->-[<->-[<->-[<->-[<->-[<->-[<<<+>---------->->[-]]]]]]]]]]]<<br />
]<br />
<<[>>++++++++++++[<++++<++++>>-]<<[.[-]>]<<]<br />
>[<++++++[>++++++++<-]>.[-]]<<<br />
<br />
[>+>+<<-]>[<+>-]+>[<->[-]]<<br />
[-<<<[<]>>>>>>>>>>.<.[>]<<.[<]>>>>>>>>>>>.<<.<<<.[>]<<<<<<<<<<.[>]>>]<<br />
<br />
<<<.<<<<<.[<]>>>>>>>>>.<<<<<..>>>>>>>>.>>>>>>>.<br />
<br />
[>]>[>+>+<<-]>[<+>-]+><br />
[<->-[<+>[-]]]<<br />
[++++++++[>+++++++++++++<-]>--.[-]<]<<br />
<br />
<<<.[<]>>>>>>>>>.>>>>>>>>>.[>]<<.<<<<<.<<<..[<]>>>>>>.[>]<<.<br />
[<]>>>>>>>>>.>.[>]<<.[<]>>>>.>>>>>>>>>>>>.>>>.[>]<<.<br />
[<]>.[>]<<<<<<.<<<<<<<<<<<..[>]<<<<.>>>..<br />
<br />
>><br />
]<br />
<br />
__EOF;<br />
<br />
<br />
$bf = new Brainfuck($code, 'Was it a dog or a cat I saw?', true);<br />
<br />
echo "'" . $bf->interpret() . "'";<br />
?><br />
</source><br />
[[Category:PHP]]</div>
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