php实现把数组按指定的个数分隔_php技巧
/**
*
* 把数组按指定的个数分隔
* @param array $array 要分割的数组
* @param int $groupNum 分的组数
*/
public function splitArray($array, $groupNum){
if(empty($array)) return array();
//数组的总长度
$allLength = count($array);
//个数
$groupNum = intval($groupNum);
//开始位置
$start = 0;
//分成的数组中元素的个数
$enum = (int)($allLength/$groupNum);
//结果集
$result = array();
if($enum > 0){
//被分数组中 能整除 分成数组中元素个数 的部分
$firstLength = $enum * $groupNum;
$firstArray = array();
for($i=0; $i array_push($firstArray, $array[$i]);
unset($array[$i]);
}
for($i=0; $i
//从原数组中的指定开始位置和长度 截取元素放到新的数组中
$result[] = array_slice($firstArray, $start, $enum);
//开始位置加上累加元素的个数
$start += $enum;
}
//数组剩余部分分别加到结果集的前几项中
$secondLength = $allLength - $firstLength;
for($i=0; $i array_push($result[$i], $array[$i + $firstLength]);
}
}else{
for($i=0; $i $result[] = array_slice($array, $i, 1);
}
}
return $result;
}

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