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[英]How to echo CSS class only once in first iteration foreach in PHP?
[英]how can I echo foreach iteration only once
是否可以只echo
顯一次 foreach 的結果? 這就是我想要實現的目標:
18-sept-2016 | 08:00 AM | some text
11:00 AM | some text
19-sept-2016 | 09:00 AM | some text
09:10 AM | some text
12:00 AM | some text
我的代碼
<?php if (!empty($notification)): ?>
<table class="table" id="notification_table">
<tbody>
<?php foreach ($notification as $row): ?>
<tr>
<td nowrap>
<?php echo date('d M',strtotime($row['created_on'])) ?>
</td>
<td><?php echo date('h:m A', strtotime($row['created_on'])) ?></td>
<td>
<?php echo $row['notification_text'] ?>
</td>
</tr>
<?php endforeach ?>
</tbody>
</table>
<?php else: ?>
<div class="alert alert-warning">
No notification
</div>
<?php endif ?>
我目前的結果:
18-sept-2016 | 08:00 AM | some text
18-sept-2016 | 11:00 AM | some text
19-sept-2016 | 09:00 AM | some text
19-sept-2016 | 09:10 AM | some text
19-sept-2016 | 12:00 AM | some text
如果我只echo
顯一次日期,我認為它看起來比我當前的結果更有效,但我不知道該怎么做
簡單像這樣:
$dates = [];
foreach ($notification as $row)
$date = date('d M',strtotime($row['created_on']));
if( !in_array($dates, $date ) ){
echo $date;
$dates[] = $date;
}
.....
}
檢查數據是否在日期數組中,如果沒有,則回顯並將其存儲在日期數組中以備下次使用。
另一種方法是將最后日期保存在臨時變量中,並將其與當前迭代日期進行比較:
<?php if (!empty($notification)):
$date = ''; ?>
<table class="table" id="notification_table">
<tbody>
<?php foreach ($notification as $row): ?>
<tr>
<td nowrap>
<?php if($date != $row['created_on']){
echo date('d M',strtotime($row['created_on']));
$date = $row['created_on'];
} ?>
</td>
<td><?php echo $row['notification_text'] ?></td>
</tr>
<?php endforeach ?>
</tbody>
</table>
<?php else: ?>
<div class="alert alert-warning">No notification</div>
<?php endif ?>
首先初始化一個像$is_same_date = ''
這樣的$is_same_date = ''
空白,我按照以下方式進行回答,因為您的數據是序列化的。
制作一個 if 條件來檢查您的數據是否已打印,如果它在$is_same_date
則無需再次顯示日期,否則您必須顯示日期並將日期存儲到$is_same_date
。
<?php
$your_date = date('d M',strtotime($row['created_on']));
if($is_same_date != '' && $is_same_date == $your_date)
echo '';
else{
echo $your_date;
$is_same_date = $your_date;
}
?>
你可以通過這種方式獲得
<tbody>
<!-- define $previous_value variable here to keep tmp value -->
<?php $previous_value = ""; ?>
<?php foreach ($notification as $row): ?>
<tr>
<td nowrap>
<?php
if($previous_value != $row['created_on']){
echo date('d M',strtotime($row['created_on']));
}
$previous_value = $row['created_on'];
?>
</td>
<td><?php echo date('h:m A', strtotime($row['created_on'])) ?></td>
<td>
<?php echo $row['notification_text'] ?>
</td>
</tr>
<?php endforeach ?>
</tbody>
如果日期未在輸入數組中排序,這將有所幫助,如下例所示:
<?php
$notification=array(0=>array('created_on'=> '18-sept-2016 08:00 AM','notification_text'=>'some text1'),
1=>array('created_on'=> '19-sept-2016 09:10 AM','notification_text'=>'some text2'),
2=>array('created_on'=> '19-sept-2016 09:00 AM','notification_text'=>'some text3'),
3=>array('created_on'=> '18-sept-2016 11:00 AM','notification_text'=>'some text4'),
4=>array('created_on'=> '19-sept-2016 12:00 AM','notification_text'=>'some text5'));
$new_array=array();
foreach($notification as $index => $value){
$item=array();
$item['time']=date('h:m A', strtotime($value['created_on']));
$item['text']=$value['notification_text'];
$new_array[date('d M',strtotime($value['created_on']))][]=$item;
}
?>
<?php if (!empty($new_array)): ?>
<table class="table" id="notification_table">
<tbody>
<?php foreach ($new_array as $index=>$row): ?>
<?php foreach ($row as $index_item=>$row_item): ?>
<tr>
<td nowrap>
<?php if($index_item ==0) echo $index ?>
</td>
<td><?php echo $row_item['time'] ?></td>
<td>
<?php echo $row_item['text'] ?>
</td>
</tr>
<?php endforeach ?>
<?php endforeach ?>
</tbody>
</table>
<?php else: ?>
<div class="alert alert-warning">
No notification
</div>
<?php endif ?>
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