Verwendung leerer Funktionen mit Foreach-Schleifen

Question

Ich möchte eine Meldung ausgeben, wenn kein Element in der Datenbank vorhanden ist. Das Der Code druckt keine Anweisungen, wenn die Datenbank keine Daten enthält.

This is my code,
<?php foreach($latest_tenders as $tenders):
if(!empty($tenders)){ 
$time = strtotime($tenders['post_date']);
                      $month=date('m', $time);
                                switch($month){
                                   case 1:
                                    echo "January "; break;
                                      .
                                      .
                                      .
                                    case 12:
                                     echo "December "; break;
                                   default:
                                    echo "January ";
                            }
echo date('d', $time).', ';
echo date('Y', $time).'&nbsp';
echo date('h', $time).':'; echo date('i',     $time).' |&nbsp';?>
     <i class="fas fa-user"></i> <?php echo $tenders['author'];?></p> 
       </div><br/>
     <?php 
         }
            else{?>
      <p style=" font-size:13px; word-spacing: 5px;color:tomato;">
          Tender Name: No advertised Tenders, Check again later.
      </p>
        <?php
            }
            endforeach;
            ?>

Answer 1

假设$latest_tenders是您的数据库结果，首先检查$latest_tenders数组是否不为空。如果不为空：循环遍历 $latest_tenders 并打印其 $tenders。否则（为空）：打印您的错误消息。

<?php if(!empty($latest_tenders)) : ?>
    <?php foreach($latest_tenders as $tenders):
        $time = strtotime($tenders['post_date']);
        $month=date('m', $time);
        switch($month){
            case 1:
                echo "January "; break;
                    .
                    .
                    .
            default:
                echo "January ";
        }
        echo date('d', $time).', ';
        echo date('Y', $time).'&nbsp';
        echo date('h', $time).':';
        echo date('i',     $time).' |&nbsp';
    ?>
        <i class="fas fa-user"></i> <?php echo $tenders['author'];?></p></div><br/>
    <?php endforeach; ?>
<?php else : ?>
    <p style=" font-size:13px; word-spacing: 5px;color:tomato;">
        Tender Name : No advertised Tenders for No, Check again later.
    </p>
<?php endif; ?>