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Grouping Algorithm for Getting Started with PHP5

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Release： 2016-07-25 09:12:51
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Example, split a set of data into 6 sets of output algorithms. Code:

  3. $groupCount = 6; //Number of groups
  4. $userIdList = array(1, 2, 3, 4, 5, 6, 7, 8, 9,10);
  5. $size = count($userIdList );
  6. $sizeGroupPer = floor($size / $groupCount );//The number of allocated items in each group
  7. $criticalValue = $size % $groupCount; //Critical value
  8. $startIndex = 0;
  9. $endIndex = 0;
  10. for ($i = 0; $i < $groupCount ; $i++ ) {
  11. if ($i < $critical) { //Indicates which groups can be allocated more
  12. $endIndex = $startIndex + $sizeGroupPer + 1;
  13. } else {
  14. $endIndex = $startIndex + $sizeGroupPer ;
  15. } // bbs.it-home.org
  17. $strGroup = "";
  18. for ($j = $startIndex ; $j < $endIndex; $j++) {
  19. if (($j + 1) == $to) {
  20. $strGroup .= $arryData[$j];
  21. } else {
  22. $strGroup .= $arryData[$j ].",";
  23. }
  24. }
  25. $startIndex = $endIndex;
  26. echo "The ".$i." group data: ".$strGroup;
  27. }
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PHP5入门之分组算法
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