server.php

<?php
$host = "192.168.70.95";
$port = 9000;
set_time_limit(0);
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); 
socket_bind($socket, $host, $port);
socket_listen($socket, SOMAXCONN);
while (true) {
  $spawn = socket_accept($socket);
  $input = socket_read($spawn, 1024, PHP_NORMAL_READ);
  $input = trim($input);

	$f = unserialize(file_get_contents('./q.txt'));
	$fn = require 'solver.php';
	$answer = $fn($input);
	file_put_contents('./q.txt', serialize($f));
	$result = '';

  $result = "HTTP/1.0 200 OK\n";
  $result .= "Date: Sat, 22 Dec 2012 00:00:01 GMT\n";
  $result .= "Content-Type: text/html\n";
  $result .= "Content-Length: " . strlen($answer) . "\n";
  $result .= "\n";

  $result .= $answer;

  $written = socket_write($spawn, $result, strlen($result));

  //echo "Request: $input\n";
  echo "Answer: $answer\n";
}
?>

solver.php

<?php
return function($input) {

	global $f;

	preg_match('/\?q=(.*)\sHTTP/i', $input, $m);
	$q =urldecode( $m[1]);
	
	echo urldecode($q) . "\n";

	$fructs = [
		'apple' => 'green',
		'banana' => 'yellow',
		'carrot' => 'orange',
		'orange' => 'orange',
		'beet' => 'red',
		'cucumber' => 'green',
		'lemon' => 'yellow',
		'tomato' => 'red'
	];

	if (preg_match('/your name/', $q)) {
		return 'Turbo2000';
	} else if (preg_match('/my name is ([a-zA-Z]+)/', $q, $m)) {
		$name = $m[1];
		$f['name'] = $name;
		return $name;
	} else if (preg_match('/What was my name/', $q, $m)) {
		return isset($f['name']) ? $f['name'] : '';
	} else if (preg_match('/KRH05/', $q, $m)) {
		return 'Deep Inside';
	} else if (preg_match('/color is apple/', $q, $m)) {
		return 'green';
	} else if (preg_match('/color is carrot/', $q, $m)) {
		return 'orange';
	}else if (preg_match('/color is banana/', $q, $m)) {
		return 'yellow';
	}else if (preg_match('/color is orange/', $q, $m)) {
		return 'orange';
	}else if (preg_match('/color is beet/', $q, $m)) {
		return 'red';
	}else if (preg_match('/color is lemon/', $q, $m)) {
		return 'yellow';
	}else if (preg_match('/color is tomato/', $q, $m)) {
		return 'red';
	} else if (preg_match('/even numbers from the set \((.*)\)/', $q, $m)) {
		$nums = explode(',',$m[1]);
		$re=[];
		foreach($nums as $n) {
			if($n%2==0) {
				$re[] = $n;
			}
		}
		return implode(',',$re);
	} else if (preg_match('/odd numbers from the set \((.*)\)/', $q, $m)) {
		$nums = explode(',',$m[1]);
		$re=[];
		foreach($nums as $n) {
			if($n%2==1) {
				$re[] = $n;
			}
		}
		return implode(',',$re);
	}else if (preg_match('/biggest number of \((.*)\)/', $q, $m)) {
		$nums = explode(',',$m[1]);
		return max($nums);
	}else if (preg_match('/smallest number of \((.*)\)/', $q, $m)) {
		$nums = explode(',',$m[1]);
		return min($nums);
	}else if (preg_match('/set descending \((.*)\)/', $q, $m)) {
		$nums = explode(',',$m[1]);
		 rsort($nums);
		return implode(',', $nums);
	} else if (preg_match('/set ascending \((.*)\)/', $q, $m)) {
		$nums = explode(',',$m[1]);
		sort($nums);
		return implode(',', $nums);
	} else if (preg_match('/Which of \"(.*)\" are ([a-z]+)/', $q, $m)) {
		$col = $m[2];
		$re = [];
		foreach ($fructs as $n => $c) {
			if($c==$col) {
				$re[] = $n;
			}
		}
		return implode(',', ($re));
	} else if (preg_match('/sum of all digits \(([0-9]+)/', $q, $m)) {
		$digs = $m[1];
		$split = str_split($digs);
		return array_sum($split);
	} else {
		$line = trim(fgets(STDIN)); // reads one line from STDIN
		return $line;
	}

	return '';
}
?>