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  1. <?php
  2.  
  3. $string = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ipsum lorem dolor Curabitur ac risus nunc. Dolor ipsum lorem.';
  4.  
  5. $lower_string = strtolower($string);
  6.  
  7. $text = array('lorem', 'ipsum', 'dolor');
  8.  
  9. $perms = AllPermutations($text);
  10. $result = 0;
  11. foreach ($perms as $piece) {
  12. 	$phrase = join(' ', $piece);
  13. 	$result += substr_count($lower_string, $phrase);
  14. }
  15.  
  16. function AllPermutations($InArray, $InProcessedArray = array())
  17. {
  18.     $ReturnArray = array();
  19.     foreach($InArray as $Key=>$value)
  20.     {
  21.         $CopyArray = $InProcessedArray;
  22.         $CopyArray[$Key] = $value;
  23.         $TempArray = array_diff_key($InArray, $CopyArray);
  24.         if (count($TempArray) == 0)
  25.         {
  26.             $ReturnArray[] = $CopyArray;
  27.         }
  28.         else
  29.         {
  30.             $ReturnArray = array_merge($ReturnArray, AllPermutations($TempArray, $CopyArray));
  31.         }
  32.     }
  33.     return $ReturnArray;
  34. }
  35.  
  36. echo $result;
  37.  
  38.  
  39. ?>
Success #stdin #stdout 0.01s 20568KB
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https://ideone.com/TGplB9
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
secret

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