我有一个小问题，我想要一个实时搜索返回一个 POST_TITLE 和一个 POST_ID。标题是为了让人们看到，但我的主要原因是我希望 POST_ID 可以使用它。

谁能帮帮我，我把代码贴在下面...

   <script>
//Gets the browser specific XmlHttpRequest Object
function getXmlHttpRequestObject() {
    if (window.XMLHttpRequest) {
        return new XMLHttpRequest();
    } else if(window.ActiveXObject) {
        return new ActiveXObject("Microsoft.XMLHTTP");
    } else {
        alert("Your Browser Sucks!\nIt's about time to upgrade don't you think?");
    }
}

//Our XmlHttpRequest object to get the auto suggest
var searchReq = getXmlHttpRequestObject();

//Called from keyup on the search textbox.
//Starts the AJAX request.
function searchSuggest() {
    if (searchReq.readyState == 4 || searchReq.readyState == 0) {
        var str = escape(document.getElementById('txtSearch').value);
        searchReq.open("GET", '/wp-content/themes/twentyten/livesearch.php?search=' + str, true);
        searchReq.onreadystatechange = handleSearchSuggest;
        searchReq.send(null);
    }        
}

//Called when the AJAX response is returned.
function handleSearchSuggest() {
    if (searchReq.readyState == 4) {


           var sx = document.getElementById('restaurantid')
        sx.innerHTML = '';

        var ss = document.getElementById('search_suggest')
        ss.innerHTML = '';
        var str = searchReq.responseText.split("\n");
        for(i=0; i < str.length - 1; i++) {
            //Build our element string.  This is cleaner using the DOM, but
            //IE doesn't support dynamically added attributes.
            var suggest = '<div onmouseover="javascript:suggestOver(this);" ';
            suggest += 'onmouseout="javascript:suggestOut(this);" ';
            suggest += 'onclick="javascript:setSearch(this.innerHTML);" ';
            suggest += 'class="suggest_link">' + str[i] + '</div>';
            ss.innerHTML += suggest;
            ss
        }
    }
}

//Mouse over function
function suggestOver(div_value) {
    div_value.className = 'suggest_link_over';
}
//Mouse out function
function suggestOut(div_value) {
    div_value.className = 'suggest_link';
}
//Click function
function setSearch(value) {
    document.getElementById('txtSearch').value = value;
    document.getElementById('restaurantid').value = value;
    document.getElementById('search_suggest').innerHTML = '';
}
</script>


<form id="frmSearch" action="">
    <input type="text" id="restaurantid" name="restaurantid" style="display: none;" />
                    <input type="text" id="txtSearch" name="txtSearch" alt="Search Criteria" onkeyup="searchSuggest();" autocomplete="off" />
                    <input type="submit" id="cmdSearch" name="cmdSearch" value="Search" alt="Run Search" />
                    <div id="search_suggest"></div>
                </form>
</code>

livesearch.php - THE AJAX PAGE

<code>
<?php

$con = mysql_connect('x', 'x', 'x);
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("xx", $con);
if (isset($_GET['search']) && $_GET['search'] != '') {
    //Add slashes to any quotes to avoid SQL problems.
    $search = addslashes($_GET['search']);
    //Get every page title for the site.
    $suggest_query = mysql_query('SELECT * FROM `mrr_posts` WHERE `post_title` LIKE \'%'.$search.'%\' AND `post_status` LIKE \'publish\' LIMIT 0, 30') or trigger_error("Query: $suggest_query\n<br />MySQL Error: " .mysql_error());            
    while ($suggest = mysql_fetch_array($suggest_query, MYSQL_ASSOC)) {    
    //while($suggest = db_fetch_array($suggest_query)) {
        //Return each page title seperated by a newline.
        echo $suggest['post_title'] . "\n";
    }
}





mysql_close($con);
?>

最佳答案

我在上面的讨论中注意到您现在返回 JSON，并从客户端解析它。我注意到你用 jQuery 标记了你的问题，所以我猜你正在使用它。这不是您问题的答案，但这里有一些使用 jQuery 进行 javascript 编码的技巧，可以帮助您大大简化代码。

• 不要直接使用 XMLHttpRequest 对象进行 ajax 调用，只需使用 $.get(url, successFunction)
• 不要使用 getElementById('some-id')，而是使用 $('#some-id')，然后执行诸如清空内部 html 之类的操作，您可以执行 $('#some-id')。 html('').使用 jQuery 元素而不是 HTMLElement，您还可以以跨浏览器兼容的方式操作 DOM:http://api.jquery.com/category/manipulation/
• 不要将 javascript 构建到 HTML 中(所有这些 onmouseover 和 onmouseout 处理程序)，而是使用 $('div.suggest_link') 选择页面上所有具有“suggest_link”类的 div。然后，附加一个实时事件处理程序，它将处理动态生成的 html，如下所示:$('div.suggest_link').live('mouseover', handleMouseOverForSuggestLink)。您可以在 jQuery 的页面上阅读更多相关信息:http://api.jquery.com/live/

所有这些建议都适用于现代浏览器，并有助于减少大量代码。祝你好运!

关于php - Ajax 实时搜索 - 获取 2 个字段而不是 1 个，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/4919162/