PHP5入門之分組演算法

例子，把一組資料拆分為6組輸出演算法。代碼： $groupCount = 6; //組數 $userIdList = array(1, 2, 3, 4, 5, 6, 7, 8, 9,10); $size = count($userIdList ); $sizeGroupPer = floor($size / $groupCount );//每組被分配的個數 $criticalValue = $size % $groupCount ; //臨界值 $startIndex = 0; $endIndex = 0; for ($i = 0; $i < $groupCount ; $i++ ) { if ($i < $critical) { //表示哪些組可以被多分配 $endIndex = $startIndex + $sizeGroupPer + 1; } else { $endIndex = $startIndex + $sizeGroupPer ; } // bbs.it-home.org $strGroup = ""; for ($j = $startIndex ; $j < $endIndex; $j++) { if (($j + 1) == $to) { $strGroup .= $arryData[$j]; } else { $strGroup .= $arryData[$j].","; } } $startIndex = $endIndex; echo "第 ".$i." 組資料：：".$strGroup; } 複製代碼

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