php链接mysql，数据CRUD操做

插入数据

<?php
 $name = $_GET['username'];
 $sex = $_GET['sex'];
 $hobby = $_GET['hobby'];
 $address = $_GET['address'];
 $remark = $_GET['remark'];

 $conn = mysqli_connect("localhost","root","root","exercise");
 if ($conn){
 $sql = "INSERT INTO info(姓名,性别,爱好,家庭住址,备注) VALUES ('$name','$sex','$hobby','$address','$remark')";
 if (mysqli_query($conn,$sql) === true) {
 echo "新纪录插入成功";
 } else {
 echo "新剧路插入失败".mysqli_error($conn);
 }
 mysqli_close($conn);
 }else{
 die("链接数据库失败：" . mysqli_error());
 }
?>

遍历表中全部数据

 $conn = mysqli_connect("localhost","root","root","exercise");
 if ($conn){ 
 $result=mysqli_query($conn,"select * from info");
 while($myrow=mysqli_fetch_row($result)) {
 echo "<tr><td>$myrow[0]</td><td>$myrow[1]</td><td>$myrow[2]</td><td>$myrow[3]</td>
 <td>$myrow[4]</td><td><a href='#'>修改</a>&nbsp<a href='#'>删除</a></td></tr>";
 }
 mysqli_close($conn);
 }else{
 die("链接数据库失败：" . mysqli_error()); }