PHP模糊查询练习- PHP

PHP连接数据库及简单模糊查询功能实现。

1.建库建表sql

DROP DATABASE IF EXISTS `test`;
CREATE DATABASE IF NOT EXISTS `test` DEFAULT CHARSET = `utf8`;
USE `test`;

-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user`  (
  `uid` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户ID',
  `username` varchar(32) NOT NULL COMMENT '名字',
  `password` char(32) NOT NULL COMMENT '密码',
  `sex` char(2) NOT NULL COMMENT '性别',
  `email` varchar(40) NOT NULL COMMENT '邮箱',
  `hobby` varchar(255) NOT NULL COMMENT '兴趣爱好',
  PRIMARY KEY (`uid`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 7 DEFAULT CHARSET=utf8 COMMENT='用户表';

-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES (1, '张三', '123456', '男', '123456@qq.com', '读书');
INSERT INTO `user` VALUES (2, '李四', '123456', '女', '123@163.com', '舞蹈');
INSERT INTO `user` VALUES (3, '汪芜', '123', '女', '369@sina.com', '琵琶');
INSERT INTO `user` VALUES (4, '赵六', '12345', '男', '10086@360.com', '武术');
INSERT INTO `user` VALUES (5, '田七', '1234', '女', '8848@qq.com', '排球');
INSERT INTO `user` VALUES (6, '赵二', '1234', '男', '654321@qq.com', '网球');

2.PHP连接数据库及简单模糊查询

<?php
$keywords = isset($_GET['keywords']) ? trim($_GET['keywords']) : '';
//echo "查询关键词为：".$keywords;

// 连接数据库，设置字符集
$conn = mysqli_connect("localhost", "root", "123456", "test", "3306") or die("数据库连接失败！");
mysqli_set_charset($conn, "utf-8");

//模糊查询语句
$sql = "SELECT * FROM user WHERE username LIKE '%{$keywords}%'";
$res = mysqli_query($conn, $sql);
$user = array();
if (!empty($keywords)) {
    while($row=mysqli_fetch_array($res)) {
        $row['username'] = str_replace($keywords, '<font color="red">'.$keywords.'</font>', $row['username']);
        $user[] = $row;
    }
}
//print_r($user);
?>

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>查询器</title>
    <style>
        .textbox{
            width:355px;
            height: 40px;
            border-radius: 3px;
            border: 1px solid #e2b709;
            padding-left: 10px;
        }
        .search{
            width: 355px;
            height: 40px;
            background-color: #7fbdf0;
            color: whitesmoke;
            border: 1px solid #888888;
        }
        table{
            background-color: #7fbdf0;
            line-height: 25px;
        }
        th{
            background-color: #fff2fb;
        }
        td{
            background-color: #fff2fb;
            text-align: center;
        }
    </style>
<body>
<form action="" method="get">
    <p><input type="text" name="keywords" class="textbox" value="" placeholder="请输入关键词"/></p>
    <p><input type="submit" value="查询" class="search"/></p>
</form>
</body>
</head>
</html>

<?php
if ($keywords) {
    echo '<h3>查询关键词为：<font COLOR="red">'.$keywords.'</font></h3>';
}

if ($user) {
    echo '<table width="500" cellpadding="5">';
    echo '<tr><th>用户名</th><th>密码</th><th>性别</th><th>邮箱</th><th>爱好</th></tr>';
    foreach ($user as $key=>$value) {
        echo '<tr>';
        echo '<td>'.$value['username'].'</td>';
        echo '<td>'.$value['password'].'</td>';
        echo '<td>'.$value['sex'].'</td>';
        echo '<td>'.$value['email'].'</td>';
        echo '<td>'.$value['hobby'].'</td>';
        echo '</tr>';
    }
} else {
    echo "没有查询到相关用户！";
}
?>

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