CODEWITHSUNDEEP
phpcpu-word
Morteza
Morteza

Reputation: 2153

Generate word combinations

For example this is my text :

$str = 'buy new microsoft windows';

I explode text and list with array :

Array
(
    [0] => buy
    [1] => new
    [2] => microsoft
    [3] => windows
)

I want to generate words in array to something like this:

buy new
buy new windows
buy microsoft 
buy microsoft windows
buy windows
new microsoft
new microsoft windows
new windows
microsoft windows

I tried with foreach and rand but I couldn't generate like showed. Is there any chance to generate just like my request?

Upvotes: 13

Views: 5017

Answers (5)

Paulraj
Paulraj

Reputation: 3397

Found from php.net shuffle doc

function powerSet($in,$minLength = 1) { 
   $count = count($in); 
   $members = pow(2,$count); 
   $return = array(); 
   for ($i = 0; $i < $members; $i++) { 
      $b = sprintf("%0".$count."b",$i); 
      $out = array(); 
      for ($j = 0; $j < $count; $j++) { 
         if ($b{$j} == '1') $out[] = $in[$j]; 
      }
      $out_val = implode(" ", $out); 
      if (count($out) >= $minLength) { 
         $return[] = $out_val; 
      } 
   } 
   return $return; 
}

print_r(powerSet($str_arr));

and the results will be,

Array
(
    [0] => windows
    [1] => microsoft
    [2] => microsoft windows
    [3] => new
    [4] => new windows
    [5] => new microsoft
    [6] => new microsoft windows
    [7] => buy
    [8] => buy windows
    [9] => buy microsoft
    [10] => buy microsoft windows
    [11] => buy new
    [12] => buy new windows
    [13] => buy new microsoft
    [14] => buy new microsoft windows
)

Upvotes: 6

Irshad Khan
Irshad Khan

Reputation: 6046

For All Possible Combinations I improved @SujitAgarwal Answer :

Download Math_Combinatoeics.

include_once 'Combinatorics.php';

$words = array('buy','microsoft','windows');
$count = count($words);
$return = array();

$combinatorics = new Math_Combinatorics;

for ($num=1; $num <= $count; $num++ ){
  foreach($combinatorics->permutations($words, $num) as $p) {
    $return[] = join(' ', $p);
  }
} 

print_r($return);

Output :

Array
(
  [0] => buy
  [1] => microsoft
  [2] => windows
  [3] => buy microsoft
  [4] => microsoft buy
  [5] => buy windows
  [6] => windows buy
  [7] => microsoft windows
  [8] => windows microsoft
  [9] => buy microsoft windows
  [10] => buy windows microsoft
  [11] => microsoft windows buy
  [12] => microsoft buy windows
  [13] => windows buy microsoft
  [14] => windows microsoft buy
)

Upvotes: 0

Soul Reaver
Soul Reaver

Reputation: 2092

function pc_permute($items, $perms = array( )) {
    if (empty($items)) {
        print join(' ', $perms) . "\n";
    } else {
        for ($i = count($items) - 1; $i >= 0; --$i) {
            $newitems = $items;
            $newperms = $perms;
            list($foo) = array_splice($newitems, $i, 1);
            array_unshift($newperms, $foo);
            pc_permute($newitems, $newperms);
        }
    }
}

source: http://docstore.mik.ua/orelly/webprog/pcook/ch04_26.htm#phpckbk-CHP-4-EX-6

also check next example on that site

example: pc_permute( explode( ' ', 'buy new microsoft windows' ) );

buy new microsoft windows
new buy microsoft windows
buy microsoft new windows
microsoft buy new windows
new microsoft buy windows
microsoft new buy windows
buy new windows microsoft
new buy windows microsoft
buy windows new microsoft
windows buy new microsoft
new windows buy microsoft
windows new buy microsoft
buy microsoft windows new
microsoft buy windows new
buy windows microsoft new
windows buy microsoft new
microsoft windows buy new
windows microsoft buy new
new microsoft windows buy
microsoft new windows buy
new windows microsoft buy
windows new microsoft buy
microsoft windows new buy
windows microsoft new buy

Upvotes: 3

deceze
deceze

Reputation: 522155

shuffle($array);
echo join(' ', array_slice($array, 0, mt_rand(1, count($array))));

This gives you one random "sentence". Repeat as necessary.

Upvotes: 6

Sujit Agarwal
Sujit Agarwal

Reputation: 12508

You can have a look at this PEAR PACKAGE Example usage:

<?php
require_once 'Math/Combinatorics.php';
$words = array('buy', 'new', 'microsoft');
$combinatorics = new Math_Combinatorics;
foreach($combinatorics->permutations($words, 2) as $p) {
  echo join(' ', $p), "\n"; 
}

The output will be:

buy new
new buy
buy microsoft
microsoft buy
new microsoft
microsoft new

Upvotes: 15

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