php+mysql+ajax實現百度搜索下拉提示框 主要有3個文件三個文件在同一個目錄裡 如下圖 
下面是三個文件的代碼 把sql文件導入到mysql數據庫裡 修改下數據庫密碼為自己的 記得哦是UTF-8編碼
php+mysql+ajax實現百度搜索下拉提示框
效果圖 
rpc.php文件
復制代碼 代碼如下:
<?php
mysql_connect('localhost', 'root' ,'');
mysql_select_db("test");
$queryString = $_POST['queryString'];
if(strlen($queryString) >0) {
$sql= "SELECT value FROM countries WHERE value LIKE '".$queryString."%' LIMIT 10";
$query = mysql_query($sql);
while ($result = mysql_fetch_array($query,MYSQL_BOTH)){
$value=$result['value'];
echo '<li onClick="fill(\''.$value.'\');">'.$value.'</li>';
}
}
?>
index.htm文件
復制代碼 代碼如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Ajax Auto Suggest</title>
<script type="text/javascript" src="http://www.iiwnet.com/templets/niu/js/jquery.min.js"></script>
<script type="text/javascript">
function lookup(inputString) {
if(inputString.length == 0) {
// Hide the suggestion box.
$('#suggestions').hide();
} else {
$.post("rpc.php", {queryString: ""+inputString+""}, function(data){
if(data.length >0) {
$('#suggestions').show();
$('#autoSuggestionsList').html(data);
}
});
}
} // lookup
function fill(thisValue) {
$('#inputString').val(thisValue);
setTimeout("$('#suggestions').hide();", 200);
}
</script>
<style type="text/css">
body {
font-family: Helvetica;
font-size: 11px;
color: #000;
}
h3 {
margin: 0px;
padding: 0px;
}
.suggestionsBox {
position: relative;
left: 30px;
margin: 10px 0px 0px 0px;
width: 200px;
background-color: #212427;
-moz-border-radius: 7px;
-webkit-border-radius: 7px;
border: 2px solid #000;
color: #fff;
}
.suggestionList {
margin: 0px;
padding: 0px;
}
.suggestionList li {
margin: 0px 0px 3px 0px;
padding: 3px;
cursor: pointer;
}
.suggestionList li:hover {
background-color: #659CD8;
}
</style>
</head>
<body>
<div>
<form>
<div>
Type your county:
<br />
<input type="text" size="30" value="" id="inputString" onkeyup="lookup(this.value);" onblur="fill();" />
</div>
<div class="suggestionsBox" id="suggestions" >
<img src="upArrow.png" alt="upArrow" />
<div class="suggestionList" id="autoSuggestionsList">
</div>
</div>
</form>
</div>
</body>
</html>
sql數據庫autoComplete.sql文件（導入到mysql）
復制代碼 代碼如下:
-- phpMyAdmin SQL Dump
-- version 3.3.5
-- http://www.phpmyadmin.net
--
-- 主機: localhost
-- 生成日期: 2010 年 12 月 09 日 02:36
-- 服務器版本: 5.0.22
-- PHP 版本: 5.2.14
SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";
--
-- 數據庫: `test`
--
-- --------------------------------------------------------
--
-- 表的結構 `countries`
--
CREATE TABLE IF NOT EXISTS `countries` (
`id` int(6) NOT NULL auto_increment,
`value` varchar(250) NOT NULL default '',
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=243 ;
--
-- 轉存表中的數據 `countries`
--
INSERT INTO `countries` (`id`, `value`) VALUES
(1, 'Afghanistan'),
(2, 'Aringland Islands'),
(3, 'Albania'),
(4, 'Algeria'),
(5, 'American Samoa'),
(6, 'Andorra'),
(7, 'Angola'),
(8, 'Anguilla'),
(9, 'Antarctica'),
(10, 'Antigua and Barbuda'),
(11, 'Argentina'),
(12, 'Armenia'),
(13, 'Aruba'),
(14, 'Australia'),
(15, 'Austria'),
(16, 'Azerbaijan'),
(17, 'Bahamas'),
(18, 'Bahrain'),
(19, 'Bangladesh'),
(20, 'Barbados'),
(21, 'Belarus'),
(22, 'Belgium'),
(23, 'Belize'),
(24, 'Benin'),
(25, 'Bermuda'),
(26, 'Bhutan'),
(27, 'Bolivia'),
(28, 'Bosnia and Herzegovina'),
(29, 'Botswana'),
(30, 'Bouvet Island'),
(31, 'Brazil'),
(32, 'British Indian Ocean territory'),
(33, 'Brunei Darussalam'),
(34, 'Bulgaria'),
(35, 'Burkina Faso'),
(36, 'Burundi'),
(37, 'Cambodia'),
(38, 'Cameroon'),
(39, 'Canada'),
(40, 'Cape Verde'),
(41, 'Cayman Islands'),
(42, 'Central African Republic'),
(43, 'Chad'),
(44, 'Chile'),
(45, 'China'),
(46, 'Christmas Island'),
(47, 'Cocos (Keeling) Islands'),
(48, 'Colombia'),
(49, 'Comoros'),
(50, 'Congo'),
(51, 'Congo'),
(52, ' Democratic Republic'),
(53, 'Cook Islands'),
(54, 'Costa Rica'),
(55, 'Ivory Coast (Ivory Coast)'),
(56, 'Croatia (Hrvatska)'),
(57, 'Cuba'),
(58, 'Cyprus'),
(59, 'Czech Republic'),
(60, 'Denmark'),
(61, 'Djibouti'),
(62, 'Dominica'),
(63, 'Dominican Republic'),
(64, 'East Timor'),
(65, 'Ecuador'),
(66, 'Egypt'),
(67, 'El Salvador'),
(68, 'Equatorial Guinea'),
(69, 'Eritrea'),
(70, 'Estonia'),
(71, 'Ethiopia'),
(72, 'Falkland Islands'),
(73, 'Faroe Islands'),
(74, 'Fiji'),
(75, 'Finland'),
(76, 'France'),
(77, 'French Guiana'),
(78, 'French Polynesia'),
(79, 'French Southern Territories'),
(80, 'Gabon'),
(81, 'Gambia'),
(82, 'Georgia'),
(83, 'Germany'),
(84, 'Ghana'),
(85, 'Gibraltar'),
(86, 'Greece'),
(87, 'Greenland'),
(88, 'Grenada'),
(89, 'Guadeloupe'),
(90, 'Guam'),
(91, 'Guatemala'),
(92, 'Guinea'),
(93, 'Guinea-Bissau'),
(94, 'Guyana'),
(95, 'Haiti'),
(96, 'Heard and McDonald Islands'),
(97, 'Honduras'),
(98, 'Hong Kong'),
(99, 'Hungary'),
(100, 'Iceland'),
(101, 'India'),
(102, 'Indonesia'),
(103, 'Iran'),
(104, 'Iraq'),
(105, 'Ireland'),
(106, 'Israel'),
(107, 'Italy'),
(108, 'Jamaica'),
(109, 'Japan'),
(110, 'Jordan'),
(111, 'Kazakhstan'),
(112, 'Kenya'),
(113, 'Kiribati'),
(114, 'Korea (north)'),
(115, 'Korea (south)'),
(116, 'Kuwait'),
(117, 'Kyrgyzstan'),
(118, 'Lao People''s Democratic Republic'),
(119, 'Latvia'),
(120, 'Lebanon'),
(121, 'Lesotho'),
(122, 'Liberia'),
(123, 'Libyan Arab Jamahiriya'),
(124, 'Liechtenstein'),
(125, 'Lithuania'),
(126, 'Luxembourg'),
(127, 'Macao'),
(128, 'Macedonia'),
(129, 'Madagascar'),
(130, 'Malawi'),
(131, 'Malaysia'),
(132, 'Maldives'),
(133, 'Mali'),
(134, 'Malta'),
(135, 'Marshall Islands'),
(136, 'Martinique'),
(137, 'Mauritania'),
(138, 'Mauritius'),
(139, 'Mayotte'),
(140, 'Mexico'),
(141, 'Micronesia'),
(142, 'Moldova'),
(143, 'Monaco'),
(144, 'Mongolia'),
(145, 'Montserrat'),
(146, 'Morocco'),
(147, 'Mozambique'),
(148, 'Myanmar'),
(149, 'Namibia'),
(150, 'Nauru'),
(151, 'Nepal'),
(152, 'Netherlands'),
(153, 'Netherlands Antilles'),
(154, 'New Caledonia'),
(155, 'New Zealand'),
(156, 'Nicaragua'),
(157, 'Niger'),
(158, 'Nigeria'),
(159, 'Niue'),
(160, 'Norfolk Island'),
(161, 'Northern Mariana Islands'),
(162, 'Norway'),
(163, 'Oman'),
(164, 'Pakistan'),
(165, 'Palau'),
(166, 'Palestinian Territories'),
(167, 'Panama'),
(168, 'Papua New Guinea'),
(169, 'Paraguay'),
(170, 'Peru'),
(171, 'Philippines'),
(172, 'Pitcairn'),
(173, 'Poland'),
(174, 'Portugal'),
(175, 'Puerto Rico'),
(176, 'Qatar'),
(177, 'Runion'),
(178, 'Romania'),
(179, 'Russian Federation'),
(180, 'Rwanda'),
(181, 'Saint Helena'),
(182, 'Saint Kitts and Nevis'),
(183, 'Saint Lucia'),
(184, 'Saint Pierre and Miquelon'),
(185, 'Saint Vincent and the Grenadines'),
(186, 'Samoa'),
(187, 'San Marino'),
(188, 'Sao Tome and Principe'),
(189, 'Saudi Arabia'),
(190, 'Senegal'),
(191, 'Serbia and Montenegro'),
(192, 'Seychelles'),
(193, 'Sierra Leone'),
(194, 'Singapore'),
(195, 'Slovakia'),
(196, 'Slovenia'),
(197, 'Solomon Islands'),
(198, 'Somalia'),
(199, 'South Africa'),
(200, 'South Georgia and the South Sandwich Islands'),
(201, 'Spain'),
(202, 'Sri Lanka'),
(203, 'Sudan'),
(204, 'Suriname'),
(205, 'Svalbard and Jan Mayen Islands'),
(206, 'Swaziland'),
(207, 'Sweden'),
(208, 'Switzerland'),
(209, 'Syria'),
(210, 'Taiwan'),
(211, 'Tajikistan'),
(212, 'Tanzania'),
(213, 'Thailand'),
(214, 'Togo'),
(215, 'Tokelau'),
(216, 'Tonga'),
(217, 'Trinidad and Tobago'),
(218, 'Tunisia'),
(219, 'Turkey'),
(220, 'Turkmenistan'),
(221, 'Turks and Caicos Islands'),
(222, 'Tuvalu'),
(223, 'Uganda'),
(224, 'Ukraine'),
(225, 'United Arab Emirates'),
(226, 'United Kingdom'),
(227, 'United States of America'),
(228, 'Uruguay'),
(229, 'Uzbekistan'),
(230, 'Vanuatu'),
(231, 'Vatican City'),
(232, 'Venezuela'),
(233, 'Vietnam'),
(234, 'Virgin Islands (British)'),
(235, 'Virgin Islands (US)'),
(236, 'Wallis and Futuna Islands'),
(237, 'Western Sahara'),
(238, 'Yemen'),
(239, 'Zaire'),
(240, 'Zambia'),
(241, 'Zimbabwe');
你在本地服務器測試下 一定很給力 而且原理很簡單 沒那麼麻煩
