PHP Array交叉表实现代码
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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
<div class="codetitle"><a style="CURSOR: pointer" data="2903" class="copybut" id="copybut2903" onclick="doCopy('code2903')"> 代码如下:
<div class="codebody" id="code2903">
/
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";
$resault .= "<tr><td>$this->title</td>\n";
foreach ( $this->verticalColumn as $value )
{
$resault .= "<td>$value</td>\n";
}
$resault .= "</tr>\n";
foreach ( $this->horizontalColumn as $i )
{
$resault .= "<tr><td>$i</td>\n";
foreach ( $this->pivotValue [$i] as $value )
{
$resault .= "<td>$value</td>\n";
}
$resault .= "</tr>\n";
}
$resault .= "</table>";
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
