PHP use result field value from mysql query for mail receiver - php

Question

I need help for this PHP script:
<?php
$link = mysql_connect('localhost', 'Username', 'PW');
$sql = "SELECT Driver, Mail FROM mytable";
$query = mysql_query($sql);
$emailBody="";
$Subject="test";
$to ="xxx";
while($row = mysql_fetch_assoc($query))
{
$emailBody .= "Driver: ".$row['Driver']."\n";
}
$to = str_replace('xxx', $row['Mail'], $to);
mail($to, $Subject, $emailBody);
I tried many things:
mail($to, $Subject, $emailBody);
mail($row['Mail'], $Subject, $emailBody);
I cannot set the field value of row['Mail'] as the receiver address.
The field values have been tested with "mymail#mail.com" and 'mymail#mail.com' and mymail#mail.com .
The replace function was just another trial.
$to =str_replace('xxx',$row['Mail'],$to);
Nothing works except hardcoding for test only..
mail("mymail#mail.com", $Subject, $emailBody);
Thanks!

Answer 1

$row only exists inside your loop (i.e. inside the { and }). But your $to line exists outside the loop, therefore it cannot access any values from $row.
If, as you mention in the comments, you wish to generate a separate email for each row of your query results then
a) you need to move the code which sets the recipient and sends the mail inside the loop so it can access the row data, and execute once per row
and
b) you need to not concatenate the body with data from every row, otherwise every email after the first will contain details from all the previous rows as well as the current one.
This should work better:
$link = mysql_connect('localhost', 'Username', 'PW');
$sql = "SELECT Driver, Mail FROM mytable";
$query = mysql_query($sql);
$Subject="test";
while($row = mysql_fetch_assoc($query))
{
$emailBody = "Driver: ".$row['Driver']."\n";
mail($row['Mail'], $Subject, $emailBody);
}
P.S. As I mentioned in the comments, you need to urgently replace the obsolete mysql_ calls with mysqli or PDO, and urgently upgrade to a supported version of PHP. I'd also recommend using a library like PHPMailer to handle your email sending - it's easier to work with than mail() and is more likely to generate valid emails which won't get accidentally blocked as spam etc. It can also support SMTP where mail() only supports local mailservers via sendmail.