クエリが結果を返さないときにメッセージ「結果が見つかりません」を表示したい

Question

サイト内で次のコードを使用して検索しています。結果が返されないときに「結果が見つかりません」というメッセージを表示したいchangings .What私はコード内で行う必要があります

HTMLは次のとおりです。

<div class="form-container"> 
    <form method="get" action="search.php"> 
     <input type="text" name="search" placeholder="Search keywords..."/> 
     <input type="submit" name="find" value=""> 
    </form> 
    </div> 

PHPは次のとおりです。

<?php 
if(isset($_GET['find'])){ 
$search = @$_GET['search']; 
$query = "SELECT * FROM `me` WHERE `post_title` LIKE '%$search%'"; 
$run = mysqli_query($con,$query); 
while($row=mysqli_fetch_assoc($run)): 
    $post_id = $row['post_id']; 
    $post_category = $row['post_category']; 
    $post_author = $row['post_author']; 
    $post_title = $row['post_title']; 
    $post_content = substr($row['post_content'],0,700); 
    $post_video = $row['post_video']; 
    $post_misc = $row['post_misc']; 
    $post_image = $row['post_image']; 
    $post_date = $row['post_date']; 
?> 


    <a class="post_title" href="complete_post.php?complete1=<?php echo $post_id; ?>"> 
    <?php echo $post_title; ?> 
    </a> 
    <p style="color:#949494; font-family:calibri; text-align:justify; margin-left:8px; width:700px; font-size:15pt; float:left;"> 
    <span style="float:left; font-size:9pt; font-family:arial; color:#959595;"> 
    By <b><?php echo $post_author; ?></b> on <b><?php echo $post_date; ?></b> in 
    <b><?php echo $post_category; ?></b> 
    </span> 
    </br> 
    <?php echo $post_content; ?>... 
    </p> 
    <a href="complete_post.php?complete=<?php echo $post_id; ?>" class="r-m"> 
    Read more.. 
    </a> 
<?php endwhile; } ?> 

Answer 1

はあなた前if -conditionを追加します。-loop

$run = mysqli_query($con,$query); 
if (! empty($run) && (! empty($_GET['search']))) { 
    while($row=mysqli_fetch_assoc($run)): 
    // your while code 
    endwhile; 
} else { 
    echo "Nothing Found"; 
} 

Answer 2

num_rows関数は、クエリによってフェッチされた行の数を返します。これはそれを行う必要があります。

<?php 
if(isset($_GET['find'])){ 
$search = @$_GET['search']; 
$query = "SELECT * FROM `me` WHERE `post_title` LIKE '%$search%'"; 
$run = mysqli_query($con,$query); 
if($run->num_rows != 0){ 
while($row=mysqli_fetch_assoc($run)): 
    $post_id = $row['post_id']; 
    $post_category = $row['post_category']; 
    $post_author = $row['post_author']; 
    $post_title = $row['post_title']; 
    $post_content = substr($row['post_content'],0,700); 
    $post_video = $row['post_video']; 
    $post_misc = $row['post_misc']; 
    $post_image = $row['post_image']; 
    $post_date = $row['post_date']; 
?> 


    <a class="post_title" href="complete_post.php?complete1=<?php echo $post_id; ?>"> 
    <?php echo $post_title; ?> 
    </a> 
    <p style="color:#949494; font-family:calibri; text-align:justify; margin-left:8px; width:700px; font-size:15pt; float:left;"> 
    <span style="float:left; font-size:9pt; font-family:arial; color:#959595;"> 
    By <b><?php echo $post_author; ?></b> on <b><?php echo $post_date; ?></b> in 
    <b><?php echo $post_category; ?></b> 
    </span> 
    </br> 
    <?php echo $post_content; ?>... 
    </p> 
    <a href="complete_post.php?complete=<?php echo $post_id; ?>" class="r-m"> 
    Read more.. 
    </a> 
<?php endwhile; 
} else { ?> 
<p>There are no results to display.</p> 
<?php } 
} ?>