如果日期具有相同的ID,我想合并表行.我有一些这样的数组数据:
Array
(
[0] => Array
(
[id] => 2
[date] => 05/13/2014
[content] => some contents 1
[act] => act1 act2 act3
)
[1] => Array
(
[id] => 2
[date] => 05/28/2014
[content] => some contents 1
[act] => act1 act2 act3
)
[2] => Array
(
[id] => 7
[date] => 06/04/2014
[content] => some contents 2
[act] => act1 act2 act3
)
)
然后,我尝试通过以下方式将其数据分组为相同的ID:
if($queryx = $this->mymodel->myfunction($par)){
$datax = $queryx;
}
$i = 0;
foreach ($datax as $idx => $val) {
$dates[$val['id']][$i] = $val['date'].",".$val['id'];
$contn[$val['id']][$i] = $val['content'];
$i++;
}
然后 :
$j = 0; $y = 0;
echo "<table border='1'>\r\n";
foreach ($dates as $idx => $val) {
$tmpexp = explode(',', $val[$j]);
echo "<tr>\r\n";
echo "<td rowspan='".count($val)."'>".$tmpexp[0]."</td>\r\n";
foreach ($val as $idx1 => $val1) {
if($idx1 > 0)
{
echo "<tr>\r\n";
}
echo "<td>".$dates[$tmpexp[1]][$y]."</td>\r\n";
if($idx1 < 1)
{
echo "<td rowspan='".count($val)."'>".$contn[$tmpexp[1]][$y]."</td>\r\n";
echo "<td rowspan='".count($val)."'>act1 act2 act3</td>";
echo "</tr>\r\n";
}
$y++;
}
$j++;
}
echo "</table>";
数据中至少有两个孩子是没有问题的,但是如果日期中只有一个孩子(请参见ID为7的数据),则会显示错误,因为未定义偏移量.因此,如果数据上只有一个孩子,我该如何添加一些处理程序.有我想要的结果:
请看这张图片:
解决方法:
我使用“预读”技术来处理嵌套循环.这确实意味着不能使用“ foreach”循环,因为必须在处理完当前记录后立即读取下一条记录.基本上,您在循环中执行的最后一个操作是在为下一次迭代设置时读取下一条记录.请注意,您永远不会测试何时打印记录,这是由组的结构决定的.代码循环与数据中组的结构相同
“组”是具有相同ID的所有记录.
我假设组中的每个条目的“内容”和“行为”都是相同的.
编辑以将“ rowspan”属性添加到适当的“ td”标签.我怀疑CSS在这一点上可能会更容易.
问题在于,只有知道其中有多少个条目,才能显示该组.
因此,我“缓冲”了数组中属于一个组的所有记录.在该组的末尾,将在html中显示相应的“ rowspan”属性.
<?PHP /* Q24028866 */
$testData = array(array('id' => 2, 'date' => '05/13/2014', 'content' => 'some contents 2', 'act' => 'act1 act2 act3'),
array('id' => 2, 'date' => '05/28/2014', 'content' => 'some contents 2', 'act' => 'act1 act2 act3'),
array('id' => 7, 'date' => '06/04/2014', 'content' => 'some contents 7', 'act' => 'act1 act2 act3'),
array('id' => 8, 'date' => '06/08/2014', 'content' => 'some contents 8', 'act' => 'act1 act2 act3'),
array('id' => 8, 'date' => '06/09/2014', 'content' => 'some contents 8', 'act' => 'act1 act2 act3'));
?>
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<table border='1'>
<thead><th>Date</th><th>Content</th><th>Act</th></thead>
<?PHP
// use 'read ahead' so there is always a 'prevIoUs' record to compare against...
$iterContents = new \ArrayIterator($testData);
$curEntry = $iterContents->current();
while ($iterContents->valid()) { // there are entries to process
$curId = $curEntry['id'];
// buffer the group to find out how many entries it has...
$buffer = array();
$buffer[] = $curEntry;
$iterContents->next(); // next entry - may be same or different id...
$curEntry = $iterContents->current();
while ($iterContents->valid() && $curEntry['id'] == $curId) { // process the group...
$buffer[] = $curEntry; // store all records for a group in the buffer
$iterContents->next(); // next entry - may be same or different id...
$curEntry = $iterContents->current();
}
// display the current group in the buffer...
echo '<tr>';
echo '<td>', $buffer[0]['date'], '</td>';
$rowspan = count($buffer) > 1 ? ' rowspan="'. count($buffer) .'"' : '';
echo '<td', $rowspan, '>', $buffer[0]['content'], '</td>',
'<td', $rowspan, '>', $buffer[0]['act'], '</td>';
echo '</tr>';
for($i = 1; $i < count($buffer); $i++) {
echo '<tr><td>', $buffer[$i]['date'], '</td>';
echo '</tr>';
}
} ?>
</table>
</body>
</html>