Question

我搜索过类似的问题，我可以找到类似的问题。但似乎没有人回答我的问题。我是php的新手，无法找到我的查询返回FALSE的原因。我的错误： mysqli_num_rows（）期望参数1为mysqli_result，第17行[Directory]中给出的布尔值

我的代码：

<?php
$con=mysqli_connect("fdb17.biz.nf","XXXX", "XXXX","2337985_searchengine", "3306");
$testdb=mysqli_select_db($con,"searchengine");
if(isset($_POST['search_query'])){
    $search_query=mysqli_real_escape_string($con,htmlentities($_POST['search_query']));
    echo "<div class=\"searchText\">Search</div><hr/>";
    $search_query_x=explode(" ",$search_query);
    $query="";
    foreach($search_query_x as $search_each){
        if($search_query_x)
            $query="keywords LIKE '%$search_each%'";
        else
            $query.="AND keywords LIKE '%$search_each%'";
    }
    $query="SELECT * FROM search WHERE $query";
    $result=mysqli_query($con,$query);
    $nr=mysqli_num_rows($result);
    if($nr==0){
        echo "Sorry, there are no matching result for <b>$search_query</b><br>
    1.Try more general words.<br>
    2.Try different words with similar meaning.<br>
    3.Please check your spelling.<br>";
    }
    else
        {
            echo "$nr results found !<p>";
            while($rr=mysqli_fetch_assoc($run))
                {
                    $title=$rr['title'];
                    $desc=$rr['desc'];
                    $url=$rr['url'];
                    echo"
    <div class='width: 400px;'>
    <div class='title'><a href='$url'><b>$title</b></a></div>
    <div class='desc'>$desc</div>
    <div class='url'>$url</div>
    </div><br>
    ";
                }
        }
}
?>

如果有人能发现那个很棒的问题。

在前几条评论之后更新，但仍然遇到同样的问题：

<?php
$con=mysqli_connect("XXXX","XXXX", "XXXX","XXXX", "XXXX");
$testdb=mysqli_select_db($con,"searchengine");
if(isset($_POST['search_query'])){
$search_query=mysqli_real_escape_string($con,($search_each));
echo "<div class=\"searchText\">Search</div><hr/>";
$search_query_x=explode(" ",$search_query);
$query="";
foreach($search_query_x as $search_each){
if($query == '')
$query="keywords LIKE %$search_each%";
else
$query="AND keywords LIKE %$search_each%";
}
$query="SELECT * FROM search WHERE $query";
$result=mysqli_query($con,$query);
$nr=mysqli_num_rows($result);
if($nr==0){
echo "Sorry, there are no matching result for <b>$search_query</b><br>
1.Try more general words.<br>
2.Try different words with similar meaning.<br>
3.Please check your spelling.<br>";
}
else
{
echo "$nr results found !<p>";
while($rr=mysqli_fetch_assoc($run))
{
$title=$rr['title'];
$desc=$rr['desc'];
$url=$rr['url'];
echo"
<div class='width: 400px;'>
<div class='title'><a href='$url'><b>$title</b></a></div>
<div class='desc'>$desc</div>
<div class='url'>$url</div>
</div><br>
";
}
}
}
?>

Answer 1

感谢您的帮助，现在解决了问题。我认为主要的罪魁祸首是一个区分大小写的Mysql表，以及你们纠正的一些错误。

MySQLi_query返回布尔值的问题

1 个答案: