php查询数据库，并通过表格展示

第一步：创建数据库

创建一个数据库php-crud

第二步：创建数据库表

在数据库php-crud下创建一个歌曲表song

/*Navicat Premium Data TransferSource Server         : MariaDBSource Server Type    : MariaDBSource Server Version : 100605 (10.6.5-MariaDB)Source Host           : 127.0.0.1:3306Source Schema         : php-crudTarget Server Type    : MariaDBTarget Server Version : 100605 (10.6.5-MariaDB)File Encoding         : 65001Date: 16/12/2023 20:49:56
*/SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;-- ----------------------------
-- Table structure for song
-- ----------------------------
DROP TABLE IF EXISTS `song`;
CREATE TABLE `song`  (`id` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '歌曲编号',`name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '歌曲名',`singer` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '歌手',`note` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '描述信息',`last_update_time` datetime NULL DEFAULT NULL COMMENT '最后一次修改时间',PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;-- ----------------------------
-- Records of song
-- ----------------------------
INSERT INTO `song` VALUES ('20230822193447', '阴天', '莫文蔚', '', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20230822215824', '赤伶', '执素兮', '', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20230902030903', '直到世界尽头', '张杰', '', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20230906185524', '曾经守候', '张碧晨', '', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20230906185614', '给未来的自己', '梁静茹', '', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20230925223008', '失衡', '梁琪清', '', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20231006181259', '哭砂', '张惠妹', '', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20231006181317', '小小', '容祖儿', '', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20231013232337', '花开忘忧', '周深', '', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20231017163512', '贪杯琥珀', '阿YueYue', '', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20231017163541', '晚风作酒', 'L (桃籽) 、周林枫、三楠', '', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20231103090132', '卿清叙', '圈9', '《猫妖的诱惑》动画OP', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20231110004454', '再见的，不见的', '郁可唯', '《我的女友是机器人》电影主题曲', '2023-12-02 01:30:55');
INSERT INTO `song` VALUES ('20231203192229', '明天', '朱心怡', '《斗破苍穹》决战云岚片尾曲', '2023-12-03 19:23:22');SET FOREIGN_KEY_CHECKS = 1;

第三步：编写php代码

WampServer下的www目录下创建php文件php_select.php

<!DOCTYPE html>
<html><head><meta charset='utf-8' /><title>查询MYSQL数据</title></head><body><table border="1"><tr><th>name</th><th>single</th><th>note</th></tr><?php$host = 'localhost';$username = 'root';$password = 'root';$database = 'php-crud';$port = 3306;$conn = new mysqli($host, $username, $password, $database, $port);if ($conn->connect_error) {die('连接失败：' . $conn->connect_error);}$sql = "SELECT name, singer, note FROM song";$result = $conn->query($sql);if ($result->num_rows > 0) {// 输出数据while($row = $result->fetch_assoc()) {echo <<<EOF<tr><td>$row[name]</td><td>$row[singer]</td><td>$row[note]</td></tr>EOF;}}$conn->close();?></table></body>
</html>

页面效果如下，注意：EOF里的字符串不能加引号，否则会报错~