connect_error) {
die("数据库连接失败: " . $conn->connect_error);
}
// 动态构建 SQL 查询语句
$conditions = [];
if (!empty($sName)) {
$conditions[] = "name LIKE '%" . $conn->real_escape_string($sName) . "%'";
}
if (!empty($sAddress)) {
$conditions[] = "address LIKE '%" . $conn->real_escape_string($sAddress) . "%'";
}
$query = "SELECT * FROM user_70";
if (count($conditions) > 0) {
$query .= " WHERE " . implode(" $sLogic ", $conditions);
}
// 执行查询
$result = $conn->query($query);
if ($result) {
$rowCount = $result->num_rows;
echo "[[$rowCount]]"; // 输出符合条件的记录数
} else {
echo "[[0]]"; // 查询失败
}
// 关闭连接
$conn->close();
} else {
// 显示查询表单
?>
多条件组合查询