PHP搜索引擎错误

Question

我正在尝试编写搜索引擎代码。
除此之外，如果我输入西海岸这样的查询，我也会得到东海岸的结果。 发生这种情况的原因是，东西两个关键字中的每个单词都包含“ coast”。

但是我想使用这行代码将两者分开：

<?php
$k = $_GET['k'];
$terms = explode(" ", $k);
$query = "SELECT * FROM Search WHERE ";
foreach ($terms as $each){
    $i++;

    if($i == 1)
        $query .= "keywords LIKE '%$each%' ";
    else
        $query .= "OR keywords LIKE '%$each%' ";

}

如果我在搜索表单中回显了使用的关键字，则会被分隔开，但是更进一步，它们不会
我怎样才能解决这个问题？

<?php
$k = $_GET['k'];
$terms = explode(" ", $k);
$query = "SELECT * FROM Search WHERE ";
foreach ($terms as $each){
    $i++;

    if($i == 1)
        $query .= "keywords LIKE '%$each%' ";
    else
        $query .= "OR keywords LIKE '%$each%' ";

}
if($k == "" || $k == " ")
{
    echo "<p> Please enter a valid search term."; //If search is empty or contains only a space.
    exit;
}
//connect to database
mysql_connect("LOCALHOST" ,"ROOT" ,"PASSWORD");
mysql_select_db("DATABASE");
$query = mysql_query($query);
$numrows = mysql_num_rows($query);
if($numrows > 0){
    while($row = mysql_fetch_assoc($query))
    {
        $id = $row['id'];
        $title = $row['title'];
        $description = $row['description'];
        $keywords = $row['keywords'];
        $link = $row['link'];
        echo "<h2><a href ='$link' class='searchcolor' color='#a8a8a8'> $title</a></h2>
            $description<br />
            This page contains information about \"<b>$query</b>\"<br /><hr>";
    }

}
else
    echo "No results for \"<b>$k</b>\"";

//disconnect
mysql_close();


?>

Answer 1

您的查询：

SELECT * FROM Search WHERE keywords LIKE '%west%' OR keywords LIKE '%$coast%';

由于OR将返回与任何一个关键字匹配的结果。 如果希望结果与所有关键字匹配，请使用AND 。

即改变

$query .= "OR keywords LIKE '%$each%' ";

至

 $query .= "AND keywords LIKE '%$each%' ";