PHP搜索，但在下一页显示结果答案

【问题标题】：PHP search , but show result in next pagePHP搜索，但在下一页显示结果
【发布时间】：2017-08-29 09:15:22
【问题描述】：

搜索.php

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!DOCTYPE html>
<html>
<head>
<style>
ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

li {
    float: left;
}

li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

li a:hover {
    background-color: #111;
}
</style>
</head>

<body>
<?php
    $query = $_GET['query']; 
    // gets value sent over search form

    $min_length = 3;
    // you can set minimum length of the query if you want

    if(strlen($query) >= $min_length){ // if query length is more or equal minimum length then

        $query = htmlspecialchars($query); 
        // changes characters used in html to their equivalents, for example: < to &gt;

        $query = mysql_real_escape_string($query);
        // makes sure nobody uses SQL injection

        $raw_results = mysql_query("SELECT * FROM register
            WHERE (`Username` LIKE '%".$query."%') OR (`Firstname` LIKE '%".$query."%')") or die(mysql_error());

        // * means that it selects all fields, you can also write: `id`, `title`, `text`
        // articles is the name of our table

        // '%$query%' is what we're looking for, % means anything, for example if $query is Hello
        // it will match "hello", "Hello man", "gogohello", if you want exact match use `title`='$query'
        // or if you want to match just full word so "gogohello" is out use '% $query %' ...OR ... '$query %' ... OR ... '% $query'

        if(mysql_num_rows($raw_results) > 0){ // if one or more rows are returned do following

            while($results = mysql_fetch_array($raw_results)){
            // $results = mysql_fetch_array($raw_results) puts data from database into array, while it's valid it does the loop

                echo "<p><h3>".$results['Username']."</h3>".$results['Contactnumber']."</p>";
                // posts results gotten from database(title and text) you can also show id ($results['id'])
            }

        }
        else{ // if there is no matching rows do following
            echo "No results";
        }

    }
    else{ // if query length is less than minimum
        echo "Minimum length is ".$min_length;
    }
?>
</body>

index.php

<!DOCTYPE html>
<html>
<head>
<style>
ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

li {
    float: left;
}

li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

li a:hover {
    background-color: #111;
}
</style>
</head>
<body>
<body bgcolor="#919191">

<ul>
  <li><a class="active" href="#home">Dashboard</a></li>
  <li><a href="#news">Add Package</a></li>
  <li><a href="#contact">View Customer</a></li>
  <li><a href="#about">View Order</a></li>
</ul>

<form action="search.php" method="GET">
        <input type="text" name="query" />
        <input type="submit" value="Search" />
    </form>



</body>
</html>

是否可能在同一页面上显示结果而不是在下一页上显示？由于我的结果显示为空白，我想在我的页面上显示，有人知道在哪里解决问题吗？我试图添加，没有帮助。

【问题讨论】：

在 index.php 中合并 search.php 代码即可解决问题
避免使用 mysql function() 因为这些现在在 php 7 中已被弃用

标签： php html mysql database search

【解决方案1】：

嗯，很简单，在php中没有办法做到这一点......你需要使用AJAX。我的朋友做了一个很棒的 AJAX 库，你可以在 Github 上找到：

https://github.com/PDKnight/XXHR

在那里，您可以学习非常基础的知识并根据需要进行搜索！

或

你可以通过网站刷新来做到这一点，这看起来不太好，但是无论如何......

将表单操作更改为“”（是的，留空）
将你的 PHP 添加到 index.php
仅在调用提交时调用您的 php：

如果（$_POST[“提交”]）{ //你的php在那里 }

所以它可能会这样工作..用户进入站点，没有任何反应，然后输入值到表单，点击提交，这导致站点刷新，然后查看结果，因为php知道他按下提交。简单的 peasy 柠檬榨汁……

【讨论】：

【解决方案2】：

您正在寻找的是 AJAX（异步 JavaScript 和 XML）。它允许您在当前页面实际加载时执行后门请求。

这就像您与某人交谈，然后迅速对另一个人耳语，而第一个人不知道这一点。在此示例中，您是浏览器，第一个人是您作为个人（客户端），第三个人是网络服务器。

因此，通过 AJAX 可以将数据发送到 php 文件并获得答案。请自行查找。

【讨论】：

【解决方案3】：

这很简单，只需从表单标签中删除 search.php 即可。

    <?php
    $query = $_GET['query']; 
    // gets value sent over search form

    $min_length = 3;
    // you can set minimum length of the query if you want

    if(strlen($query) >= $min_length){ // if query length is more or equal minimum length then

        $query = htmlspecialchars($query); 
        // changes characters used in html to their equivalents, for example: < to &gt;

        $query = mysql_real_escape_string($query);
        // makes sure nobody uses SQL injection

        $raw_results = mysql_query("SELECT * FROM register
            WHERE (`Username` LIKE '%".$query."%') OR (`Firstname` LIKE '%".$query."%')") or die(mysql_error());

        // * means that it selects all fields, you can also write: `id`, `title`, `text`
        // articles is the name of our table

        // '%$query%' is what we're looking for, % means anything, for example if $query is Hello
        // it will match "hello", "Hello man", "gogohello", if you want exact match use `title`='$query'
        // or if you want to match just full word so "gogohello" is out use '% $query %' ...OR ... '$query %' ... OR ... '% $query'

        if(mysql_num_rows($raw_results) > 0){ // if one or more rows are returned do following

            while($results = mysql_fetch_array($raw_results)){
            // $results = mysql_fetch_array($raw_results) puts data from database into array, while it's valid it does the loop

                echo "<p><h3>".$results['Username']."</h3>".$results['Contactnumber']."</p>";
                // posts results gotten from database(title and text) you can also show id ($results['id'])
            }

        }
        else{ // if there is no matching rows do following
            echo "No results";
        }

    }
    else{ // if query length is less than minimum
        echo "Minimum length is ".$min_length;
    }
?>
    <!DOCTYPE html>
    <html>
    <head>
    <style>
    ul {
        list-style-type: none;
        margin: 0;
        padding: 0;
        overflow: hidden;
        background-color: #333;
    }

    li {
        float: left;
    }

    li a {
        display: block;
        color: white;
        text-align: center;
        padding: 14px 16px;
        text-decoration: none;
    }

    li a:hover {
        background-color: #111;
    }
    </style>
    </head>
    <body>
    <body bgcolor="#919191">

    <ul>
      <li><a class="active" href="#home">Dashboard</a></li>
      <li><a href="#news">Add Package</a></li>
      <li><a href="#contact">View Customer</a></li>
      <li><a href="#about">View Order</a></li>
    </ul>

    <form action="" method="GET">
            <input type="text" name="query" />
            <input type="submit" value="Search" />
        </form>



    </body>
    </html>

【讨论】：

注意：未定义索引：第 2 行 D:\xampp\htdocs\adminsearch1.php 中的查询