具有多个关键字的搜索引擎

Search engine with multiple keywords

我的搜索引擎正在工作,但仅当我搜索 1 个词时。每当我搜索多个关键字时,我只会得到 1 个结果。

示例:在我的数据库中,我有像 'test' 和 'hello' 这样的标签; 每当我输入 "test hello" 并单击 "Search" 时,它都会显示:

1 结果你好(这是带有标签 = hello 的 post 的标题)。

我的代码(search.php - 我获得搜索结果的页面):

<?php

$button = $_GET ['submit'];
$search = $_GET ['search']; 

if(!$button) {
    echo "you didn't submit a keyword";
} else {
    if(strlen($search)<=1) {
        echo "Search term too short";
    } else {
        echo "You searched for <b>$search</b> <hr size='1'></br>";
        mysql_connect("localhost","root","root");
        mysql_select_db("myschool");

        $search_exploded = explode (" ", $search);

        foreach($search_exploded as $search_each) {
            $x = NULL;
            $construct = NULL;
            $x++;
            if($x==1) {
                $construct .="tag LIKE '%$search_each%'";
            } else {
                $construct .="OR tag LIKE '%$search_each%'";
            }

            $construct ="SELECT * FROM posts WHERE $construct";
            $run = mysql_query($construct);

            $foundnum = mysql_num_rows($run);

            if ($foundnum==0) {
                echo "Sorry, there are no matching result for <b>$search</b>.";
            } else {
                echo "$foundnum results found !<p>";

                while($runrows = mysql_fetch_assoc($run)) {
                    $title = $runrows ['title'];
                    $tag = $runrows ['tag'];

                    echo "<a href='#'><b>$title</b></a><br>";

                }
            }

        }
    }
}
?>

问题可能出在 $x=++ 部分,因为我认为引擎没有显示甚至搜索数据库中的所有行,并且当行数 > 1 时没有显示。

在此先感谢大家。

编辑:

我现在用上面的代码得到了多个结果,但我得到的是这种形式:

您搜索的是 hello test post是

找到 1 个结果! 你好 找到 1 个结果!

测试 找到 1 个结果!

post是新手

我怎样才能让它在 1 个地方添加结果,而不是每次它为不同的关键字找到新结果时都说出来?

您的代码有几个问题。你错过了这一行的 "

echo "Sorry, there are no matching result for <b>$search</b>";

最后一个else没有if

在foreach语句之前需要启动$x变量,如果要作为整数使用则不要设置为null。

$construct 变量有相同的错误,你必须有相同的响应 3 次,那是因为你必须在调用 mysql select.[=12 之前关闭 foreach 语句=]

$x = 1;
$construct = NULL;

foreach($search_exploded as $search_each) 
{ 
    if($x==1) { 
        $construct .="tag LIKE '%$search_each%'"; 
    } else { 
        $construct .="OR tag LIKE '%$search_each%'"; 
    } 
    $x++;
}
$select ="SELECT * FROM posts WHERE $construct";
...

上次编辑

<?php

$button = $_GET ['submit'];
$search = $_GET ['search']; 

if(!$button) {
    echo "you didn't submit a keyword";
} else {
    if(strlen($search)<=1) {
        echo "Search term too short";
    } else {
        echo "You searched for <b>$search</b> <hr size='1'></br>";
        mysql_connect("localhost","root","root");
        mysql_select_db("myschool");

        $search_exploded = explode (" ", $search);
        $x = 1;
        $construct = '';

        foreach($search_exploded as $search_each) {
            if($x==1) {
                $construct .="tag LIKE '%$search_each%'";
            } else {
                $construct .="OR tag LIKE '%$search_each%'";
            }
            $x++;
        }

        $select ="SELECT * FROM posts WHERE $construct";
        $run = mysql_query($select);

        $foundnum = mysql_num_rows($run);

        if ($foundnum==0) {
            echo "Sorry, there are no matching result for <b>$search</b>.";
        } else {
            echo "$foundnum results found !<p>";

            while($runrows = mysql_fetch_assoc($run)) {
                $title = $runrows ['title'];
                $tag = $runrows ['tag'];

                echo "<a href='#'><b>$title</b></a><br>";

            }
        }
    }
}
?>