php 多行多列

<?php
// 创建一个二维数组
$data = [
    ['Alice', 25, 'Engineer'],
    ['Bob', 30, 'Designer'],
    ['Charlie', 35, 'Manager']
];

// 遍历并打印二维数组
echo "<table border='1'>";
echo "<tr><th>Name</th><th>Age</th><th>Job</th></tr>";
foreach ($data as $row) {
    echo "<tr>";
    foreach ($row as $cell) {
        echo "<td>$cell</td>";
    }
    echo "</tr>";
}
echo "</table>";
?>

foreach ($data as $row) {
    echo "<tr>";
    foreach ($row as $cell) {
        if (empty($cell)) {
            echo "<td>N/A</td>"; // 或者其他默认值
        } else {
            echo "<td>$cell</td>";
        }
    }
    echo "</tr>";
}

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

$sql = "SELECT id, name, age FROM users";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    echo "<table border='1'><tr><th>ID</th><th>Name</th><th>Age</th></tr>";
    while($row = $result->fetch_assoc()) {
        echo "<tr>";
        echo "<td>" . $row["id"]. "</td>";
        echo "<td>" . $row["name"]. "</td>";
        echo "<td>" . $row["age"]. "</td>";
        echo "</tr>";
    }
    echo "</table>";
} else {
    echo "0 结果";
}
$conn->close();
?>