PHP search results page design and implementation skills

With the explosive growth of online information, search functions have become a vital part of websites and applications. As a popular server-side scripting language, PHP is widely used in website development. This article will discuss the design and implementation techniques of PHP search results pages, combined with specific code examples, to help developers better implement search functions.

1. Page design

1. Search box design

The search box is the core component of the search page, usually located at the top of the page. Design a concise and clear search box where users can enter keywords to search. Code example:

<form action="search.php" method="GET">
    <input type="text" name="keyword" placeholder="请输入关键词">
    <button type="submit">搜索</button>
</form>

2. Search results display

Search results display is a key part of the search page, usually displaying the retrieved content in the form of a list or card. Code example:

<?php
if(isset($_GET['keyword'])){
    $keyword = $_GET['keyword'];
    // 进行搜索操作，获取搜索结果
    // $results = perform_search($keyword);

    // 模拟搜索结果
    $results = array("结果1", "结果2", "结果3");

    if(count($results) > 0){
        foreach($results as $result){
            echo "<div>$result</div>";
        }
    } else {
        echo "未找到相关结果";
    }
}
?>

3. Paging design

When there are too many search results, it is usually necessary to display them in paging, which can improve the user experience and reduce the load on the server. Code example:

$results_per_page = 5;
if(isset($_GET['page'])){
    $page = $_GET['page'];
} else{
    $page = 1;
}

$start_index = ($page - 1) * $results_per_page;
$end_index = $start_index + $results_per_page;

// 获取当前页的搜索结果
$page_results = array_slice($results, $start_index, $results_per_page);

// 显示当前页的搜索结果
foreach($page_results as $result){
    echo "<div>$result</div>";
}

// 分页链接
$total_pages = ceil(count($results) / $results_per_page);
for($i = 1; $i <= $total_pages; $i++){
    echo "<a href='search.php?keyword=$keyword&page=$i'>$i</a>";
}

2. Implementation of PHP search function

1. Search function implementation

To implement the search function, you need to connect to a database or other data sources, and based on the key input by the user Match the words and return the search results. The following is a simple MySQL database search implementation example:

// 连接数据库
$connection = mysqli_connect("localhost", "username", "password", "database");

if(isset($_GET['keyword'])){
    $keyword = $_GET['keyword'];

    // 查询数据库中匹配关键词的内容
    $query = "SELECT * FROM articles WHERE title LIKE '%$keyword%' OR content LIKE '%$keyword%'";
    $result = mysqli_query($connection, $query);

    $results = array();
    while($row = mysqli_fetch_assoc($result)){
        $results[] = $row['title'];
    }
}

2. Search results sorting

Sometimes search results need to be sorted by relevance or other criteria, which can be achieved using some algorithms. The following is a simple example of sorting by matching degree:

// 对搜索结果按匹配度排序
function sortByRelevance($results, $keyword){
    $relevance = array();
    foreach($results as $result){
        similar_text($result, $keyword, $percent);
        $relevance[$result] = $percent;
    }

    arsort($relevance);

    $sorted_results = array_keys($relevance);
    return $sorted_results;
}

// 使用排序函数
$results = sortByRelevance($results, $keyword);

In summary, designing and implementing a PHP search results page requires consideration of page layout, search functions, paging, and result sorting. With the help of the above specific code examples, developers can better understand how the PHP search function is implemented, thereby improving user experience and search results.

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