Question

我有一个的搜索引擎，但只有当我搜索一个单词时才会这样做。每当我搜索多个关键字时，我只得到1个结果。

示例：在我的数据库中，我有像＆＃39; test＆＃39;并且＆＃39;你好＆＃39; ; 每当我进入＆＃34;测试你好＆＃34;然后点击＆＃34;搜索＆＃34;它显示：

1结果你好（这是带有tag = hello的帖子的标题）。

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>";

                }
            }

        }
    }
}
?>

问题可能在$x=++部分周围，因为我认为引擎没有显示甚至搜索数据库中的所有行，并且没有显示num行计数＆gt; 1。

先谢谢你们。

编辑：

我现在用上面的代码获得了多个结果但是我以这种形式得到它们：

您搜索了hello test postare

找到1个结果！你好找到1个结果！

测试找到1个结果！

postare noua

如何让它在一个地方添加结果，而不是每次为不同的关键字找到新结果时都说出来？

Answer 1

您的代码有几个问题。你在这一行错过了"：

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

最后else没有if

Answer 2

您需要在foreach语句之前启动$ x变量，如果要将其用作整数，则不要将其设置为null。

$ construct变量有相同的错误，你必须有三次相同的响应，那是因为你必须在调用mysql select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>";

            }
        }
    }
}
?>

搜索引擎有多个关键字

我现在用上面的代码获得了多个结果但是我以这种形式得到它们：

postare noua

2 个答案:

上次编辑