| Gray | S |
| Gray | M |
| Gray | L |
| Red | S |
| Red | M |
| Red | L |
我想像这样水平地将数据加载到我的表中,按颜色分组:
| Gray | S | M | L | XL |
| Red | S | M | L | XL |
这是我的代码:
<table>
<?PHP foreach($products as $product) {?>
<tr>
<td><?PHP echo $product['color'];?></td>
<td><?PHP echo $product['size'];?></td>
</tr>
<?PHP }
?>
</table>
问题:如何将数据加载到我的表中,每行按颜色分组?我可以不用单独的MySQL查询吗?
解决方法:
一点点的手动迭代将成为你的朋友……
$DatabaseResult = [ ['Gray','S'],['Gray','M'],['Gray','L'],['Red','S'],['Red','M'],['Red','L'] ];
$Grouped = array_fill_keys( array_unique( array_column( $DatabaseResult, 0 ) ), array() );
foreach( $DatabaseResult as $row )
{
$Grouped[ $row[0] ][] = $row[1];
}
print_r( $Grouped );
//Array
//(
// [Gray] => Array
// (
// [0] => S
// [1] => M
// [2] => L
// )
//
// [Red] => Array
// (
// [0] => S
// [1] => M
// [2] => L
// )
//)
然后你会创建两个循环,外部是你的“颜色”行,内部是你的“大小”列
<table border="1">
<?PHP foreach( $Grouped as $colour => $sizes ) {?>
<tr>
<td><?PHP echo $colour;?></td>
</td>
<?PHP foreach($sizes as $size) {?>
<td><?PHP echo $size;?></td>
<?PHP } ?>
</tr>
<?PHP } ?>
</table>
此外,如果您需要打印可用性的大小图表,您可以这样做……
$Products = [
['color'=>'Gray','size'=>'S','quantity'=>2],
['color'=>'Gray','size'=>'M','quantity'=>4],
['color'=>'Gray','size'=>'L','quantity'=>7],
['color'=>'Red','size'=>'S','quantity'=>8],
['color'=>'Red','size'=>'M','quantity'=>6],
['color'=>'Red','size'=>'XXL','quantity'=>1],
];
// Helper function to locate products from the array
function SearchProductArray( $products, $color, $size )
{
foreach( $products as $product )
{
if( $product[ 'color' ] == $color and $product[ 'size' ] == $size )
{
return $product;
}
}
return false;
}
// Locate all the unique Values
$Colours = array_unique( array_column( $Products, 'color' ) );
$Sizes = ['SS','S','M','L','XL','XXL'];
?>
<table border="1">
<tr>
<td>Colour</td>
<?PHP foreach( $Sizes as $Size ) {?>
<td><?PHP echo $Size;?></td>
<?PHP } ?>
</tr>
<?PHP foreach( $Colours as $Colour ) {?>
<tr>
<td><?PHP echo $Colour;?></td>
<?PHP foreach( $Sizes as $Size ) { $Product = SearchProductArray( $Products, $Colour, $Size ); ?>
<td><?PHP echo ( $Product ) ? $Product['quantity'] : ' '; ?></td>
<?PHP } ?>
</tr>
<?PHP } ?>
</table>