The addition, deletion, modification and query functions implemented by mysql in php

墨辰丷
Release: 2023-03-30 22:10:02
Original
1785 people have browsed it

This article mainly introduces the addition, deletion, modification and query functions implemented by mysql in php. Interested friends can refer to it. I hope it will be helpful to everyone.

List code

<?php
  $con = mysql_connect("localhost:3306","root","");

  if (!$con) {
    die(&#39;Could not connect: &#39; . mysql_error());
  }

  mysql_select_db("test", $con);

  $result = mysql_query("SELECT * FROM user");

  echo "<table border=&#39;1&#39;>
  <tr>
  <th>Username</th>
  <th>Password</th>
  </tr>";

  while($row = mysql_fetch_array($result)) {
    echo "<tr>";
    echo "<td>" . $row[&#39;username&#39;] . "</td>";
    echo "<td>" . $row[&#39;password&#39;] . "</td>";
    echo "</tr>";
  }
  echo "</table>";

  mysql_close($con);

?>
Copy after login

Delete

<?php
  $con = mysql_connect("localhost","root","");
  if (!$con) {
    die(&#39;Could not connect: &#39; . mysql_error());
  }

  mysql_select_db("test", $con);

  mysql_query("DELETE FROM user WHERE username = &#39;$_POST[username]&#39;");

  mysql_close($con);
?>
Copy after login

Add

<?php
  $con = mysql_connect("localhost:3306","root","");

  if (!$con) {
    die(&#39;Could not connect: &#39; . mysql_error());
  }

  mysql_select_db("test", $con);

  $sql = "INSERT INTO user (username,password)
  VALUES
  (&#39;$_POST[username]&#39;,&#39;$_POST[password]&#39;)";

  if (!mysql_query($sql,$con)) {
    die(&#39;Error: &#39; . mysql_error());
  }

  echo "1 record added";

  mysql_close($con);

?>
Copy after login

Modify

<?php

  $con = mysql_connect("localhost","root","");
  if (!$con) {
    die(&#39;Could not connect: &#39; . mysql_error());
  }

  mysql_select_db("test", $con);

  mysql_query("UPDATE user SET password = &#39;$_POST[password]&#39; WHERE username = &#39;$_POST[username]&#39;");

  mysql_close($con);
?>
Copy after login
<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>
Copy after login

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

Related recommendations:

How to use and introduce the PHP Closure class

PHP Mysql jQuery statistics are currently online Number of users

Usage of switch statement in PHP

The above is the detailed content of The addition, deletion, modification and query functions implemented by mysql in php. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!