推薦:
登陸頁面index.html
註冊頁面 register.html
瀏覽器輸入:域名/phpmyadmin ,沒有域名輸入:ip/phpmyadmin或者127.0.0.1/phpmyadmin(127.0.0.1為本機地址)
在資料庫裡建立表單
程式碼如下:
index.html
<!DOCTYPE html><html><head> <meta charset="UTF-8"> <title>登入</title></head><body> <p> <b>登入</b> <form action="login.php" method="post"> <p><span>使用者名稱:</span><input type="text" name="user" required="" /></p> <p><span>密碼:</span><input type="password" name="pass"/ required=""></p> <p><input type="reset" name=""/> <input type="submit" name=""/></p> </form> <a href="register.html">新使用者註冊</a> </p></body></html>
login.php
<meta charset="utf-8"><?php $conn = mysqli_connect('localhost','root','password','db_name') or die('資料庫連線失敗'); $conn->query("SET NAMES 'UTF8'"); $user = $_POST['user']; $pass = $_POST['pass']; $sql="SELECT * FROM users where user='{$user}' and pass='{$pass}'"; $result=$conn->query($sql); $row = mysqli_num_rows($result); //若表中存在輸入的使用者名稱和密碼,row=1;若表中使用者名稱不存在或密碼錯誤,則row=0 if($row == 1){ echo $row['user']."登陸成功!"; } else{ echo"登入失敗,請重新登入!"; } ?>
register.html
<!DOCTYPE html><html><head> <meta charset="UTF-8"> <title>註冊</title></head><body> <p> <b>註冊</b> <form action="register.php" method="post"> <p><span>使用者名稱:</span><input type="text" name="user" required=""/></p> <p><span>密碼:</span><input type="password" name="pass" required=""/></p> <p><span>聯絡:</span><input type="text" name="connect" value="" required=""/></p> <p> <input type="reset" name=""/> <input type="submit" name=""/> </p> </form> <a href="index.html">已註冊</a> </p></body></html>
register.php
<?php header ( "Content-type:text/html;charset=utf-8" ); $conn = mysqli_connect('localhost','root','password','db_name') or die('資料庫連線失敗'); $conn->set_charset('utf8'); $user = $_POST['user']; $pass = $_POST['pass']; $connect = $_POST['connect']; $sql = "INSERT INTO users(id,user,pass,connect) VALUES (null,'{$user}' ,'{$pass}','{$connect}')"; mysqli_query($conn,$sql) or die(mysqli_error($conn)); echo("註冊成功!!!<br/><a href='index.html'>點選登入</a>") ?>
———————————————————————————————————————
1. PHP7連線資料庫的方式:使用mysqli或PDO
使用mysqli_connect()時地址用localhost而不是ip,否則連線不上伺服器。
參考:https://blog.csdn.net/zwliang98/article/details/82997349
2. php輸出執行sql語句的錯誤資訊:
mysqli_query($conn,$sql) or die(mysqli_error( $conn ));
3. bug
bug 1:
Incorrect integer value: ‘’ for column ‘id’ at row 1
php5以上的版本如果是空值應該要寫NULL
#錯誤 $sql = "INSERT INTO users(id,user,pass,connect) VALUES ('','{$user}' ,'{$pass}','{$connect}')";#改為 $sql = "INSERT INTO users(id,user,pass,connect) VALUES (null,'{$user}' ,'{$pass}','{$connect}')";
bug 2:
Incorrect string value: ‘\xE7\x94\xB7’ for column ‘sex’ at row 1
連結:MySQL插入中文錯誤問題方法
以上就是php如何連線mysql實現簡單註冊登陸頁面的詳細內容,更多請關注TW511.COM其它相關文章!