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php实现搜索

2026-04-02 20:14:00PHP

PHP实现搜索功能

在PHP中实现搜索功能通常涉及数据库查询、表单处理和结果展示。以下是几种常见的实现方法：

基础数据库搜索

// 连接数据库
$conn = new mysqli('localhost', 'username', 'password', 'database');

// 获取搜索关键词
$search = isset($_GET['search']) ? $_GET['search'] : '';

// 执行查询
if (!empty($search)) {
    $stmt = $conn->prepare("SELECT * FROM products WHERE name LIKE ?");
    $searchTerm = "%$search%";
    $stmt->bind_param("s", $searchTerm);
    $stmt->execute();
    $result = $stmt->get_result();

    while ($row = $result->fetch_assoc()) {
        echo $row['name'] . "<br>";
    }
}

多条件搜索

$search = $_GET['search'] ?? '';
$category = $_GET['category'] ?? '';

$query = "SELECT * FROM products WHERE 1=1";
$params = [];
$types = '';

if (!empty($search)) {
    $query .= " AND (name LIKE ? OR description LIKE ?)";
    $params[] = "%$search%";
    $params[] = "%$search%";
    $types .= 'ss';
}

if (!empty($category)) {
    $query .= " AND category_id = ?";
    $params[] = $category;
    $types .= 'i';
}

$stmt = $conn->prepare($query);
if (!empty($params)) {
    $stmt->bind_param($types, ...$params);
}

全文索引搜索（MySQL）

对于更高效的搜索，可以在MySQL中创建全文索引：

ALTER TABLE products ADD FULLTEXT(name, description);

PHP代码：

php实现搜索

$search = $_GET['search'] ?? '';
if (!empty($search)) {
    $stmt = $conn->prepare("SELECT * FROM products 
        WHERE MATCH(name, description) AGAINST(? IN BOOLEAN MODE)");
    $stmt->bind_param("s", $search);
    $stmt->execute();
    // 处理结果...
}

前端表单示例

<form method="GET" action="search.php">
    <input type="text" name="search" placeholder="输入关键词...">
    <select name="category">
        <option value="">所有分类</option>
        <option value="1">电子产品</option>
        <option value="2">服装</option>
    </select>
    <button type="submit">搜索</button>
</form>

搜索结果分页

$page = $_GET['page'] ?? 1;
$limit = 10;
$offset = ($page - 1) * $limit;

$query = "SELECT SQL_CALC_FOUND_ROWS * FROM products 
          WHERE name LIKE ? LIMIT ? OFFSET ?";
$searchTerm = "%$search%";
$stmt = $conn->prepare($query);
$stmt->bind_param("sii", $searchTerm, $limit, $offset);
$stmt->execute();

// 获取总记录数
$totalResult = $conn->query("SELECT FOUND_ROWS()");
$totalRows = $totalResult->fetch_row()[0];
$totalPages = ceil($totalRows / $limit);