[8pla.net]

Pseudocode quoted from Zero:

Code

Knowledge:
  the sky is blue
  the sky is big

Query:
  the sky is *

Answer:
  blue
  big

Here is a version written in PHP:

Code

<?php

/* Knowledge */

$knowledge=array(
  "the sky is blue",
  "the sky is big",
                );

/* Query */

foreach($knowledge as $key=>$query)
       {
       preg_match("/the sky is (.*)/i",$query,$matches);
       $matched[]=$matches;
       }

/* Answer */
  echo "Answer ".var_export($matched,TRUE)."\n";


?>

   Answer array (
     0 =>
     array (
       0 => 'the sky is blue',
       1 => 'blue',
     ),
     1 =>
     array (
       0 => 'the sky is big',
       1 => 'big',
     ),
   )