PHP Array交叉表实现代码_php技巧

如果使用sql语句做的话 工作量太大了，于是尝试自己写一个交叉表的类，好二话不说，我们看看代码

/**
* 基本交叉表
* @author hugh
*
*/
class Pivot
{
private $HORIZONTAL_TOTAL_FIELD = 'total';
private $VERTICAL_TOTAL_FIELD = 'total';
private $data;
private $topPivot;
private $leftPivot;
private $measure;
private $horizontalColumn = array ();
private $verticalColumn = array ();
private $pivotValue = array ();
private $isHorizontalTotal = true;
private $isVerticalTotal = true;
private $horizontalTotal = null;
private $verticalTotal = null;
private $title = 'PivotTab';
/**
* 初始化交叉表
*/
private function InitPivot()
{
$this->topPivot;
foreach ( $this->data as $d )
{
$this->horizontalColumn [] = $d [$this->leftPivot];
$this->verticalColumn [] = $d [$this->topPivot];
}
$this->horizontalColumn = array_unique ( $this->horizontalColumn );
$this->verticalColumn = array_unique ( $this->verticalColumn );
$reasult = array ();
foreach ( $this->horizontalColumn as $h )
{
foreach ( $this->verticalColumn as $v )
{
$this->pivotValue [$h] [$v] = 0;
}
}
}
/**
* 填充数据
*/
private function fillData()
{
foreach ( $this->data as $row )
{
$this->pivotValue [$row [$this->leftPivot]] [$row [$this->topPivot]] += $row [$this->measure];
}
if ($this->isHorizontalTotal)
{
$this->setHorizontalTotal ();
}
if ($this->isVerticalTotal)
{
$this->setVerticalTotal ();
}
}
/**
* 设置纵向合计
*/
private function setVerticalTotal()
{
$this->verticalColumn [] = $this->VERTICAL_TOTAL_FIELD;
foreach ( $this->horizontalColumn as $i )
{
$rowsum = 0;
foreach ( $this->verticalColumn as $j )
{
$rowsum += $this->pivotValue [$i] [$j];
}
$this->pivotValue [$i] [$this->TOTAL_FIELD] = $rowsum;
}
}
/**
* 设置横向合计
*/
private function setHorizontalTotal()
{
$this->horizontalColumn [] = $this->HORIZONTAL_TOTAL_FIELD;
foreach ( $this->verticalColumn as $i )
{
$rowsum = 0;
foreach ( $this->horizontalColumn as $j )
{
$rowsum += $this->pivotValue [$j] [$i];
}
$this->pivotValue [$this->HORIZONTAL_TOTAL_FIELD] [$i] = $rowsum;
}
}
/**
* 渲染
*/
function Render()
{
echo '

'; 
print_r ( $this->pivotValue ); 
} 
/** 
* 渲染为table 
*/ 
function RenderToTable() 
{ 
$resault = "

\n";
$resault .= "\n";
foreach ( $this->verticalColumn as $value )
{
$resault .= "\n";
}
$resault .= "\n";
foreach ( $this->horizontalColumn as $i )
{
$resault .= "\n";
foreach ( $this->pivotValue [$i] as $value )
{
$resault .= "\n";
}
$resault .= "\n";
}
$resault .= "

$this->title	$value
$i	$value

";
return $resault;
}
/**
* 构造交叉表
* @param $data 数据源
* @param $topPivot 头栏目字段
* @param $leftPivot 左栏目字段
* @param $measure 计算量
*/
function __construct(array $data, $topPivot, $leftPivot, $measure)
{
$this->data = $data;
$this->leftPivot = $leftPivot;
$this->topPivot = $topPivot;
$this->measure = $measure;
$this->horizontalColumn = array ();
$this->verticalColumn = array ();
$this->InitPivot ();
$this->fillData ();
}
}

重点在于InitPivot方法及fillData方法。
InitPivot里面保证了所有的item都会有值（默认为0）
fillData方法使用选择填充添加的方法，将数据填充入我们装数据的$pivotValue里面。

然后喜欢怎么输出都可以了