[英]MYSQL SELECT QUERY ONLY ONE DATA
下面的view_products()
仅显示我的表product
中的一个数据,其中包含 20 个数据。 根据您放置的位置return $output;
在显示第一个数据的while loop
while loop
或在显示最后一个数据的 while 循环外。
<?php echo view_products(); ?>
$dbhost = "localhost";
$dbuser = "root";
$dbpass = "password@edadmin";
$dbname = "estore";
$dbconn = mysqli_connect($dbhost, $dbuser, $dbpass, $dbname);
//Test if connection occurred,
if (mysqli_connect_errno()) {
die("Database connection failed: " .
mysqli_connect_error() .
" (" . mysqli_connect_errno() . ")");
}
function view_products()
{
global $dbconn;
$sql = "SELECT * FROM product";
$result = mysqli_query($dbconn, $sql);
if (mysqli_num_rows($result) > 0) {
while ($products = mysqli_fetch_assoc($result)) {
$output = "<div class=\"col-lg-4 col-md-6 portfolio-item filter-app wow fadeInUp\">";
$output .= "<div class=\"portfolio-wrap\"><figure>";
$output .= "<img src=" . $products['ProductImage'] . " class=\"img-fluid\" alt=\"\">";
$output .= "<a href=" . $products['ProductImage'] . " data-lightbox=\"portfolio\" data-title=\"App 1\" class=\"link-preview\" title=\"Preview\"><i class=\"ion ion-eye\"></i></a>";
$output .= "</figure>";
$output .= " <div class=\"portfolio-info\">";
$output .= "<p><a href=\"#\">" . $products['ProductName'] . " </a></p>";
$output .= "<p>" . "₦ " . $products['ProductAmount'] . "</p>";
$output .= "</div></div></div>";
return $output;
}
} else {
return "No product yet";
} // return $output;
}
原因是您在循环的第一行重置$output
的内容$output = "<div class=\"col-lg-4 col-md-6 portfolio-item filter-app wow fadeInUp\">";
所以如果你把return放在循环的末尾,在第一个循环中它将返回第一条记录并退出function,如果你把它放在function的末尾,在每个循环中$output
都会被清除,内容该循环的内容将仅写入$output
因此在 function 的末尾,您将只有最后一个循环的内容$output
您可以将$output
设置为空字符串,然后将 append 设置为循环中的所有内容。 还要在else
块中设置$output
的值,然后在最后返回$output
function view_products()
{
global $dbconn;
$sql = "SELECT * FROM product";
$result = mysqli_query($dbconn, $sql);
if (mysqli_num_rows($result) > 0) {
$output = "";
while ($products = mysqli_fetch_assoc($result)) {
$output .= "<div class=\"col-lg-4 col-md-6 portfolio-item filter-app wow fadeInUp\">";
$output .= "<div class=\"portfolio-wrap\"><figure>";
$output .= "<img src=" . $products['ProductImage'] . " class=\"img-fluid\" alt=\"\">";
$output .= "<a href=" . $products['ProductImage'] . " data-lightbox=\"portfolio\" data-title=\"App 1\" class=\"link-preview\" title=\"Preview\"><i class=\"ion ion-eye\"></i></a>";
$output .= "</figure>";
$output .= " <div class=\"portfolio-info\">";
$output .= "<p><a href=\"#\">" . $products['ProductName'] . " </a></p>";
$output .= "<p>" . "₦ " . $products['ProductAmount'] . "</p>";
$output .= "</div></div></div>";
}
} else {
$output = "No product yet";
} // return $output;
return $output;
}
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