我在wordpress中有一个表，它越来越长。
我想设置一个限制，所以只显示最近250个结果，或者只显示最近30天的结果。更简单的。
此代码来自Wordpress联盟管理插件
<p><?php printf(__( 'Displaying %1$d of %2$d impressions', 'wpam' ), count($this->viewData['impressions']), $this->viewData['impressionCount']); ?></p>
<table class="widefat">
<thead>
<tr>
<th width="25"><?php _e( 'ID', 'wpam' ) ?></th>
<th width="200"><?php _e( 'Date Occurred', 'wpam' ) ?></th>
<th width="100"><?php _e( 'Creative', 'wpam' ) ?></th>
<th><?php _e( 'Referrer', 'wpam' ) ?></th>
</tr>
</thead>
<tbody>
<?php
$creativeNames = $this->viewData['creativeNames'];
foreach ( $this->viewData['impressions'] as $impression ) {
?>
<tr class="impression">
<td><?php echo $impression->impressionId?></td>
<td><?php echo date("m/d/Y H:i:s", $impression->dateCreated)?></td>
<td><?php echo $creativeNames[$impression->sourceCreativeId]?></td>
<td><?php echo $impression->referer?></td>
</tr>
<?php } ?>
</tbody>
</table>
<?php
if ( ! count( $this->viewData['impressions'] ) ):
?>
<div class="daterange-form"><p><?php _e( 'No records found for the date range selected.', 'wpam' ) ?></p></div>
<?php endif; ?>
您应该检查插件上是否有限制印象数量的选项。如果没有，可以通过用array_slice对数组进行切片来限制它，如下所示：
<?php
$creativeNames = $this->viewData['creativeNames'];
$impressions = array_slice($this->viewData['impressions'], 0, 250);
foreach ( $impressions as $impression ) {
?>
<tr class="impression">
<!-- your code -->
</tr>
<?php } ?>
如果你只需要最后250个，你可以把它和array_reverse:结合起来
$impressions = array_slice(array_reverse($this->viewData['impressions']), 0, 250);