All Possible Words Combination From Phrase/String – PHP Script

Next you have two functions in PHP to get all word combination from phrase, but the algorithm can be translated into any other language, initially I had it done in delphi/pascal:

function natural_combi_words($phrase){
  $arw = array();
  $words = explode(' ',trim($phrase));
  $nw = count ($words);
  for ($i=0; $i<$nw; $i++){
    $k ='';
    $cnt = 0;
    for ($j=$i; $j<($nw); $j++){
      $k .= $words[$j].' ';
      $arw[$cnt][] = trim($k);
      $cnt++;
    }
  }
  return $arw;
}

function natural_combi_words2($phrase){
  $combi_source = natural_combi_words($phrase);
  $combi_words = $combi_source[0];
  $nw = count ($combi_source);
  for ($i=1; $i<$nw; $i++){
    $combi_words = array_merge($combi_words, $combi_source[$i]);
  }
  return $combi_words;
}

$phrase = "I have a dream that one day";
print_r(natural_combi_words($phrase));
print_r(natural_combi_words2($phrase));

if phrase is: I have a dream that one day , function natural_combi_words2() returns:

Array
(
    [0] => I
    [1] => have
    [2] => a
    [3] => dream
    [4] => that
    [5] => one
    [6] => day
    [7] => I have
    [8] => have a
    [9] => a dream
    [10] => dream that
    [11] => that one
    [12] => one day
    [13] => I have a
    [14] => have a dream
    [15] => a dream that
    [16] => dream that one
    [17] => that one day
    [18] => I have a dream
    [19] => have a dream that
    [20] => a dream that one
    [21] => dream that one day
    [22] => I have a dream that
    [23] => have a dream that one
    [24] => a dream that one day
    [25] => I have a dream that one
    [26] => have a dream that one day
    [27] => I have a dream that one day
)

and function natural_combi_words() returns multi-dimensional arrays like this:

Array
(
    [0] => Array
        (
            [0] => I
            [1] => have
            [2] => a
            [3] => dream
            [4] => that
            [5] => one
            [6] => day
        )

    [1] => Array
        (
            [0] => I have
            [1] => have a
            [2] => a dream
            [3] => dream that
            [4] => that one
            [5] => one day
        )

    [2] => Array
        (
            [0] => I have a
            [1] => have a dream
            [2] => a dream that
            [3] => dream that one
            [4] => that one day
        )

    [3] => Array
        (
            [0] => I have a dream
            [1] => have a dream that
            [2] => a dream that one
            [3] => dream that one day
        )

    [4] => Array
        (
            [0] => I have a dream that
            [1] => have a dream that one
            [2] => a dream that one day
        )

    [5] => Array
        (
            [0] => I have a dream that one
            [1] => have a dream that one day
        )

    [6] => Array
        (
            [0] => I have a dream that one day
        )

)

I used this solution back in 2003, in a video player for movies, which looks for subtitles for a movie in subtitles folder and even if the name of the movie was not 100% identical to the subtitle. The program always chooses the right subtitle if there is one!

Example:

video file:

Laughing.out.Loud.2009.1080p.Blu-ray.REMUX.AVC.DTS-HD.MA.5.1-playBD.avi

the subtitle chosen from thousands of other subtitles in the same folder:

LOL.(Laughing.out.Loud).2009.BDRip.XviD.HORiZON-ArtSubs.ENG-RO.srt

Practically using this algorithm you can calculate a rating for all scanned subtitles and which has the highest value, that is chosen, but you can choose 2-3 with maximum (valid) ratings not just one.
Of course, the rating must be calculated using multi-dimensional arrays on each group, eliminated on the very small ones, etc … the final solution is laborious and looks like an A.I.

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