你使用过百度吧~~你知道当你输入关键词的一部分时，关键词的剩下的部分会提示出来的，如此神奇的效果对于wordpess是前所未有的，那天看了大发的wordpress ajax搜索提示后那就明白了，当然下面的内容也是跟 大发的“wordpress ajax搜索提示”一样的。
转载过来方便自己研究啊~~
大致的意思是，你输入关键字，会自动提示搜索结果，当然是不影响enter进入搜索页面的，看上去高端大气上档次~你可以去感受下
实用性就不做评价了，重要的是可以装逼~废话不多数，let’s do it.
首先要改装你的search.php，让这货可以返回json数据
把 get_header() 替换成下面的代码
<code><?php
if(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest'){
$array_posts = array ();
if (have_posts()) :
while (have_posts()) : the_post();
array_push($array_posts, array("title"=>get_the_title(),"url"=>get_permalink()));
endwhile;
endif;
echo json_encode($array_posts);
} else {
get_header(); ?></code>
if(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest'){
$array_posts = array ();
if (have_posts()) :
while (have_posts()) : the_post();
array_push($array_posts, array("title"=>get_the_title(),"url"=>get_permalink()));
endwhile;
endif;
echo json_encode($array_posts);
} else {
get_header(); ?></code>
把 get_footer() 替换成下面的代码
<code><?php get_footer();}?></code>
这样就能返回json数据了。
然后还得装修下你的搜索样式，主要是为提示结果做定位的
<code><div id="search-container" class="ajax_search">
<form method="get" id="searchform" action="<?php echo esc_url(home_url('/')); ?>">
<div class="filter_container"><input type="text" value="" autocomplete="off" placeholder="输入内容并回车" name="s" id="search-input"/><ul id="search_filtered" class="search_filtered"></ul> </div>
<input type="submit" name="submit" id="searchsubmit" class="searchsubmit" value=""/>
</form>
</div></code>
<form method="get" id="searchform" action="<?php echo esc_url(home_url('/')); ?>">
<div class="filter_container"><input type="text" value="" autocomplete="off" placeholder="输入内容并回车" name="s" id="search-input"/><ul id="search_filtered" class="search_filtered"></ul> </div>
<input type="submit" name="submit" id="searchsubmit" class="searchsubmit" value=""/>
</form>
</div></code>
然后就是JS代码了，需要先利用php顶一个变量，在footer.php中加入下面的代码
<code><script>var home_url="<?php echo esc_url(home_url('/')); ?>";</script></code>
然后下面的代码放到你的JS文件中
<code>//search
var input_search = $("#search-input");
function makeAjaxSearch(result) {
if (result.length == 0) {
$("#search_filtered").empty().show().append('<li><a href="javascript:vold(0)"><strong>这能搜到嘛？</strong></a></li>');
} else {
$("#search_filtered").empty().show();
for (var i = 0; i < result.length; i++) $("#search_filtered").append('<li><a href="' + result[i]["url"] + '">' + result[i]["title"] + '</a></li>');
}
}
var delaySearch;
function startSearch() {
$.ajax({
type: "GET",
url: home_url,
data: "s=" + input_search.val(),
dataType: 'json',
success: function (result) {
makeAjaxSearch(result);
console.log(result);
}
});
}
var event_ajax_search = {
bind_event: function () {
input_search.bind('keyup', function (e) {
if (input_search.val() != "" && e.keyCode != 40) {
if (delaySearch) {
clearTimeout(delaySearch)
}
delaySearch = setTimeout(startSearch, 200);
}
if (e.keyCode == 40) {
search_filtered.moveable();
}
})
},
unbind_event: function () {
input_search.unbind('keyup');
}
};
var search_filtered = {
moveable: function () {
var current = 0;
$('#search_filtered').find('a').eq(current).focus();
$(document).bind("keydown.search_result", function (e) {
if (e.keyCode == 40) {
if (current >= $('#search_filtered').find('a').size()) {
current = 0;
}
$('#search_filtered').find('a').eq(++current).focus();
e.preventDefault();
}
if (e.keyCode == 38) {
if (current < 0) {
current = $('#search_filtered').find('a').size() - 1;
}
$('#search_filtered').find('a').eq(--current).focus();
e.preventDefault();
}
});
},
hide: function () {
$(document).unbind("keyup.search_result");
$('#search_filtered').fadeOut();
}
};
input_search.focus(function () {
event_ajax_search.bind_event();
}).blur(function () {
event_ajax_search.unbind_event();
});
</code>
var input_search = $("#search-input");
function makeAjaxSearch(result) {
if (result.length == 0) {
$("#search_filtered").empty().show().append('<li><a href="javascript:vold(0)"><strong>这能搜到嘛？</strong></a></li>');
} else {
$("#search_filtered").empty().show();
for (var i = 0; i < result.length; i++) $("#search_filtered").append('<li><a href="' + result[i]["url"] + '">' + result[i]["title"] + '</a></li>');
}
}
var delaySearch;
function startSearch() {
$.ajax({
type: "GET",
url: home_url,
data: "s=" + input_search.val(),
dataType: 'json',
success: function (result) {
makeAjaxSearch(result);
console.log(result);
}
});
}
var event_ajax_search = {
bind_event: function () {
input_search.bind('keyup', function (e) {
if (input_search.val() != "" && e.keyCode != 40) {
if (delaySearch) {
clearTimeout(delaySearch)
}
delaySearch = setTimeout(startSearch, 200);
}
if (e.keyCode == 40) {
search_filtered.moveable();
}
})
},
unbind_event: function () {
input_search.unbind('keyup');
}
};
var search_filtered = {
moveable: function () {
var current = 0;
$('#search_filtered').find('a').eq(current).focus();
$(document).bind("keydown.search_result", function (e) {
if (e.keyCode == 40) {
if (current >= $('#search_filtered').find('a').size()) {
current = 0;
}
$('#search_filtered').find('a').eq(++current).focus();
e.preventDefault();
}
if (e.keyCode == 38) {
if (current < 0) {
current = $('#search_filtered').find('a').size() - 1;
}
$('#search_filtered').find('a').eq(--current).focus();
e.preventDefault();
}
});
},
hide: function () {
$(document).unbind("keyup.search_result");
$('#search_filtered').fadeOut();
}
};
input_search.focus(function () {
event_ajax_search.bind_event();
}).blur(function () {
event_ajax_search.unbind_event();
});
</code>
最后放上优雅的CSS
<code>.filter_container {display: inline-block;position: relative;}
.ajax_search .search_filtered a {display: block;font-size: 12px;overflow: hidden;padding: 7px 12px 7px 10px;text-overflow: ellipsis;white-space: nowrap;width: 153px;color: #D14836;}
.ajax_search .search_filtered {background-color: rgba(255, 255, 255, 0.95);left: 0;position: absolute;text-align: left;top: 102%;z-index: 200;}
#search-input{float: left;border:none;height:22px;width:150px;padding-right:25px;line-height: 22px;text-indent: 10px;font-size:12px;background-color: transparent;background-image:url(img/search.png);background-repeat:no-repeat;background-position:right center}
#search-input:focus{background-color: #fff;}
#searchsubmit{display: none;}
.ajax_search .search_filtered a:hover, .ajax_search .search_filtered a:focus {background-color: rgba(0, 0, 0, 0.03);text-decoration: none;outline:thin dotted}</code>
.ajax_search .search_filtered a {display: block;font-size: 12px;overflow: hidden;padding: 7px 12px 7px 10px;text-overflow: ellipsis;white-space: nowrap;width: 153px;color: #D14836;}
.ajax_search .search_filtered {background-color: rgba(255, 255, 255, 0.95);left: 0;position: absolute;text-align: left;top: 102%;z-index: 200;}
#search-input{float: left;border:none;height:22px;width:150px;padding-right:25px;line-height: 22px;text-indent: 10px;font-size:12px;background-color: transparent;background-image:url(img/search.png);background-repeat:no-repeat;background-position:right center}
#search-input:focus{background-color: #fff;}
#searchsubmit{display: none;}
.ajax_search .search_filtered a:hover, .ajax_search .search_filtered a:focus {background-color: rgba(0, 0, 0, 0.03);text-decoration: none;outline:thin dotted}</code>
文章来自大发 http://fatesinger.com/3033.html 夜枫仅作笔记