mysqli_fetch_array 如何獲取索引號

Question

我正在使用 mysqli fetch 數組從 mysql 表中獲取數據，在獲取數據之后，我想要輪播項目顯示他從數組中的索引號，以便我可以使用索引號識別它們以提供活動屬性

 <?php $qry = mysqli_query($koneksi, "SELECT * FROM t_berita ORDER BY tanggal DESC LIMIT 3"); while($row = mysqli_fetch_array($qry, MYSQLI_ASSOC)){ $qrygbr = mysqli_query($koneksi, "SELECT * FROM t_gambar WHERE id_berita = '".$row['id']."'");; $rowcount=mysqli_num_rows($qry); while ($rowgbr = mysqli_fetch_array($qrygbr, MYSQLI_ASSOC)) { # code... ?> <div class="carousel-item active"> <div class="card"> <div class="card-body" style="padding: 0;"> <div class="row"> <div class="col-lg-6"><img class="img-fluid" style="width: 100%;height: 100%;background-image: url(data:image/jpeg;base64,<?php echo base64_encode($rowgbr['gambar']);?>);background-position: center;background-size: cover;background-repeat: no-repeat;" /></div> <div class="col-lg-6"> <div class="d-md-flex d-lg-flex flex-column justify-content-md-center align-items-md-center justify-content-lg-center align-items-lg-start" style="padding-top: 20px;padding-left: 10px;padding-right: 10px;height: 100%;margin-bottom: 20px;"> <h4><?php echo $row['judul']; ?></h4> <h6 class="text-muted card-subtitle mb-2"> <?php echo $row['tanggal'].$rowgbr[]; ?> </h6> <p> <?php echo $row['artikel']; ?> </p> <p> </p> <div class="d-flex"></div><a class="btn btn-primary" role="button" href="bacaberita.php?id=<?php echo $row['id'] ?>">Read More</a></div> </div> </div> </div> </div> </div> <?php } } mysqli_close($koneksi); ?>

Answer 1

更改第二個查詢

$qrygbr = mysqli_query($koneksi, "SELECT  @a:=@a+1 serial_number,t_gambar.* FROM t_gambar, (SELECT @a:= 0) AS a WHERE t_gambar.id_berita = '".$row['id']."'");

while ($rowgbr = mysqli_fetch_array($qrygbr, MYSQLI_ASSOC)) {
    echo $rowgbr['serial_number']; //this is you your needed serial number
}

Answer 2

以下內容應該可以幫助您了解您需要做什么。 我在循環中應用了一個 $count 變量以隨着循環的繼續而增加。 我已將變量添加到

向您展示它是如何工作的。

<?php
                                    $koneksi = mysqli_connect('localhost', 'admbumm_DedSec', 'omnimon786.,', 'admbumm_selipin');
                                    $qry = mysqli_query($koneksi, "SELECT * FROM t_berita ORDER BY tanggal DESC LIMIT 3");
                                    while($row = mysqli_fetch_array($qry, MYSQLI_ASSOC)){
                                        $qrygbr = mysqli_query($koneksi, "SELECT * FROM t_gambar WHERE id_berita = '".$row['id']."'");
                                        $rowcount=mysqli_num_rows($qry);
                                        $count = 1;
                                        while ($rowgbr = mysqli_fetch_array($qrygbr, MYSQLI_ASSOC)) { 
                                            # code...

                                ?>
                                <div class="carousel-item active">
                                    <div class="card">
                                        <div class="card-body" style="padding: 0;">
                                            <div class="row">
                                                <div class="col-lg-6"><img class="img-fluid" style="width: 100%;height: 100%;background-image: url(data:image/jpeg;base64,<?php echo base64_encode($rowgbr['gambar']);?>);background-position: center;background-size: cover;background-repeat: no-repeat;" /></div>
                                                <div class="col-lg-6">
                                                    <div class="d-md-flex d-lg-flex flex-column justify-content-md-center align-items-md-center justify-content-lg-center align-items-lg-start" style="padding-top: 20px;padding-left: 10px;padding-right: 10px;height: 100%;margin-bottom: 20px;">
                                                        <h4><?php
                                                            echo $row['judul'];
                                                        ?></h4>
                                                        <h6 class="text-muted card-subtitle mb-2">
                                                            <?php
                                                                echo $row['tanggal'].$rowgbr[];
                                                            ?>
                                                        </h6>
                                                        <p>
                                                            <?php
                                                                echo $row['artikel'];
                                                            ?>
                                                        </p>
                                                        <p>
                                                        <p>
                                                            <?php
                                                                echo $count;
                                                            ?>
                                                        </p>
                                                        </p>
                                                        <div class="d-flex"></div><a class="btn btn-primary" role="button" href="bacaberita.php?id=<?php echo $row['id'] ?>">Read More</a></div>
                                                </div>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                <?php
                                $count = $count + 1;
                                        }
                                    }
                                    mysqli_close($koneksi);
                                ?>

Answer 3

您可能想在 SQL 查詢中添加另一個變量，例如$qry = mysqli_query($koneksi, "SELECT * FROM t_berita ORDER BY tanggal DESC LIMIT 3");

到$qry = mysqli_query($koneksi, "SELECT COUNT(*) as c,* FROM t_berita ORDER BY tanggal DESC LIMIT 3");

基本上，SQL 會計算可用的總行數並將其放入c 。 所以你可以在 PHP 代碼中用c做一些簡單的循環