從mysql分配變量到php

Question

我想通過電子郵件向用戶發送一個用戶名和密碼，它們是從我的數據庫中發出的。我如何達到目的？我使用下面的當前代碼，每當我收到郵件時，我都意識到$ username和$ password的位置是空的，這意味着數據庫值不會被髮送。

<?php 

$to = $email; 
$subject = "Registered details with BFS ! "; 
$message = "Dear $username, as requested , here are your login details. "; 
$message .= " Username = $username Password = $password"; 
$headers = 'From:noreply@bfs.com'; 
$sentmail = mail($to,$subject,$message,$headers); 

?> 

編輯****

全碼

 <?php 
error_reporting(0); 


$email=$_POST['email']; 


echo $result['price']; 
if($_POST['submit']=='Send') 
{ 
mysql_connect('localhost','root','root') or die(mysql_error); 
mysql_select_db('users'); 
$query="select * from user where email='$email'"; 
$result=mysql_query($query) or die(error); 
if(mysql_num_rows($result)) 
{ 
echo "User exists"; 

$username = mysql_query("select * from user where username = '$username'"); 
$result = mysql_fetch_assoc($username); 

$to = $email; 
$subject = "Registered details with BFS ! "; 
$message = "Dear $result, as requested , here are your login details. "; 
$message .= " Username = $username Password = $password"; 
$headers = 'From:noreply@bfs.com'; 
$sentmail = mail($to,$subject,$message,$headers); 
} 


else 
{ 
echo "No user exist with this email id"; 
} 
} 

?> 

Answer 1

更改此：

$username = mysql_query("select * from user where username = '$username'"); 

進入這個：

$res = mysql_fetch_assoc($result); 
$res = $res['username']; 
$username = mysql_query("select * from user where username = '$res'"); 

這：

$result = mysql_fetch_assoc($username); 

到這一點：

$result = mysql_fetch_assoc($username); 
$username = $result['username']; 
$password = $result['password']; 
$result = $result['username']; 

如果它不工作，我一定是錯過了一些東西:-)但如果這樣做，用它來了解更多關於如何邏輯工作，然後閱讀有關PDO並使用它。 :-)