PHP Array交叉表实现代码

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
复制代码 代码如下:

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';

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;
}
}
}

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 ();
}
}

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;
}
}

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;
}
}

function Render()
{
echo '

'; 
print_r ( $this->pivotValue ); 
} 
 
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; 
} 
 
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