Question

我正在尝试使用ajax和php创建一个搜索框。出于某种原因，我得到了

"Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in C:\wamp\www\livesearch\livesearch.php on line 30"

以下代码：

session_start();
include("_/inc/dbcon.php");
    $link = mysql_connect($host, $login, $pw);
    mysql_select_db($database);
    if($link){
     echo 'connect';
    }
// Define Output HTML Formating
$html = '';
$html .= '<li class="result">';
$html .= '<a target="_blank" href="urlString">';
$html .= '<h3>nameString</h3>';
$html .= '<h4>functionString</h4>';
$html .= '</a>';
$html .= '</li>';

// Get Search
$search_string = preg_replace("/[^A-Za-z0-9]/", " ", $_POST['query']);
$search_string = mysql_real_escape_string($search_string);

// Check Length More Than One Character
if (strlen($search_string) >= 1 && $search_string !== ' ') {
    // Build Query
    $query = 'SELECT * FROM sp_user WHERE function LIKE "%'.$search_string.'%" OR name LIKE "%'.$search_string.'%" OR surname LIKE "%'.$search_string.'%" OR username LIKE "%'.$search_string.'%"';

    // Do Search

    $result = mysql_query($query);
    while($results = mysql_fetch_array($result)) {
        $result_array[] = $results;
    }

    // Check If We Have Results
    if (isset($result_array)) {
        foreach ($result_array as $result) {

            // Format Output Strings And Hightlight Matches
            $display_function = preg_replace("/".$search_string."/i", "<b class='highlight'>".$search_string."</b>", $result['function']);
            $display_name = preg_replace("/".$search_string."/i", "<b class='highlight'>".$search_string."</b>", $result['name']);
            $display_url = 'http://php.net/manual-lookup.php?pattern='.urlencode($result['function']).'&lang=en';

            // Insert Name
            $output = str_replace('nameString', $display_name, $html);

            // Insert Function
            $output = str_replace('functionString', $display_function, $output);

            // Insert URL
            $output = str_replace('urlString', $display_url, $output);

            // Output
            echo($output);
        }
    }else{

        // Format No Results Output
        $output = str_replace('urlString', 'javascript:void(0);', $html);
        $output = str_replace('nameString', '<b>No Results Found.</b>', $output);
        $output = str_replace('functionString', 'Sorry :(', $output);

        // Output
        echo($output);
    }

Answer 1

您必须使用mysql_fetch_assoc()（这样您才能在Associate array中使用字段名称），并且您还必须在字段名称中添加引号，因为您使用了一些关键名称，例如{根据@Frederik Spang的建议{1}}，name等Reserved Words in MySQL

function

在指定字段名称时，在字段名称中使用反引号（“`”）是一种很好的做法。

您还应该使用

检查

$query = 'SELECT * FROM sp_user WHERE `function` LIKE "%'.$search_string.'%" OR `name` LIKE "%'.$search_string.'%" OR `surname` LIKE "%'.$search_string.'%" OR `username` LIKE "%'.$search_string.'%"';

是否有记录

$result

Ajax searchbox：MySQL错误

1 个答案: