php+mysql实现简单的增删改查功能

2019-11-21 22:52:34

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列表代码

<?php  $con = mysql_connect("localhost:3306","root","");  if (!$con) {    die('Could not connect: ' . mysql_error());  }  mysql_select_db("test", $con);  $result = mysql_query("SELECT * FROM user");  echo "<table border='1'>  <tr>  <th>Username</th>  <th>Password</th>  </tr>";  while($row = mysql_fetch_array($result)) {    echo "<tr>";    echo "<td>" . $row['username'] . "</td>";    echo "<td>" . $row['password'] . "</td>";    echo "</tr>";  }  echo "</table>";  mysql_close($con);?>

删除

<?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);?>

添加

<?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);?>

修改

<?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);?>

<html>  <head>    <title>用PHP向数据库中实现简单的增删改查</title>  </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>Delete</h1>    <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>Update</h1>    <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>

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