这是我的代码
$produk = $_GET['produk'];
$sql = "select * from tbproduk where namaproduk = '$produk' ";
$query = mysqli_query($con,$sql) or die("error $sql");
$num = mysqli_num_rows($query);
echo $num;
if(!empty($num)) {
for ($x = 1; $x <= $num / 3; $x++) {
echo '<div class="w3-content w3-display-container mySlides">
<div class="row">';
for ($i = 0; $i <= 5; $i++) {
$result = mysqli_fetch_array($query);
$namaproduk = $result['namaproduk'];
$harga = $result['harga'];
$pembeli = $result['pembeli'];
if(!empty($harga)) {
echo '<div class="col-4">
<img class="gbr"/>
<span> ' . $harga . ' </span><button class="tengbr" onclick="beli(' . $namaproduk . ',' . $pembeli . ')">Beli</button>
</div>';
}else{
echo "";
}
}
echo '</div>
</div>';
}
}else{
echo "
<script>
alert('tidak ada produk yang dimaksud');
document.getElementsByClassName('navigasi').style.display = 'none';
</script>
";
}
它确实有效,但我在变量$num
中的所有数据都显示为onload,我必须移动到另一个slideindex,这将是正常的。这是我的脚本代码
var slideIndex = 1;
showDivs(slideIndex);
function plusDivs(n) {
showDivs(slideIndex += n);
document.getElementById('slideindex').innerText = slideIndex;
}
function showDivs(n) {
var i;
var x = document.getElementsByClassName("mySlides");
if (n > x.length) {slideIndex = 1}
if (n < 1) {slideIndex = x.length}
for (i = 0; i < x.length; i++) {
x[i].style.display = "none";
}
x[slideIndex-1].style.display = "block";
}
这是我移动到另一个幻灯片索引的HTML代码
<div class="navigasi">
<a style="border: 1px solid black;padding: 10px;background-color: grey;color: white;cursor: pointer;" onclick="plusDivs(-1)">❮</a>
<span id="slideindex"></span>
<a style="border: 1px solid black;padding: 10px;background-color: grey;color: white;cursor:pointer;" onclick="plusDivs(1)">❯</a>
<span id="slideindex">
将显示索引的位置
答案 0 :(得分:1)
你有2个人,首先你要划分X / 3,这并不代表你只有3. 50/3 = 16.并且在你的内部为你重复6次for ($i = 0; $i <= 5; $i++)
为什么不简单地
$sql = "select * from tbproduk where namaproduk = '$produk' LIMIT 0,3";
甚至
for ($x = 1; $x <= 3; $x++)