用PHP向数据库中实现简单的增删改查（纯代码，待完善），php增删
php $con = mysql_connect("localhost:3306","root",""); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("test", $con); $result = mysql_query("SELECT * FROM user"); echo "
| Username | Password |
|---|---|
| " . $row['username'] . " | "; echo "" . $row['password'] . " | "; echo "
php $con = mysql_connect("localhost","root",""); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("test", $con); mysql_query("DELETE FROM user WHERE username = '$_POST[username]'"); mysql_close($con); ?> 删除该用户所有信息delete.php
php $con = mysql_connect("localhost:3306","root",""); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("test", $con); $sql = "INSERT INTO user (username,password) VALUES ('$_POST[username]','$_POST[password]')"; if (!mysql_query($sql,$con)) { die('Error: ' . mysql_error()); } echo "1 record added"; mysql_close($con); ?> 注册一个新用户insert.php
php $con = mysql_connect("localhost","root",""); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("test", $con); mysql_query("UPDATE user SET password = '$_POST[password]' WHERE username = '$_POST[username]'"); mysql_close($con); ?> 修改一个用户密码update.php
<html> <head> <title>FORMtitle> head> <body> <br /> <h1>Insert:h1> <form action="insert.php" method="post"> username:<input type="name" name="username"/> <br /> password:<input type="password" name="password"/> <input type="submit" value="submit"/> form> <br /><hr /><br /> <h1>Deleteh1> <form action="delete.php" method="post"> username:<input type="name" name="username" /> <br /> Are you sure?<input type="submit" value="sure" /> form> <br /><hr /><br /> <h1>Updateh1> <form action="update.php" method="post"> username:<input type="name" name="username"/> <br /> You want to change your password into:<input type="password" name="password"/> <input type="submit" value="submit"/> form> <br /><hr /><br /> body> html> 以上三个功能的提交源Operate.html
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