如何在一个表中搜索特定的列名

<?php
// 连接到数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);

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

// 选择要搜索的表
$tableName = "your_table_name";

// 获取表的所有列名
$sql = "SHOW COLUMNS FROM $tableName";
$result = $conn->query($sql);

// 搜索特定的列名
$targetColumnName = "your_column_name";
$found = false;

if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        if ($row["Field"] == $targetColumnName) {
            echo "找到匹配的列名：" . $row["Field"];
            $found = true;
            break;
        }
    }
}

if (!$found) {
    echo "未找到匹配的列名。";
}

// 关闭数据库连接
$conn->close();
?>