Code executed despite false if statement - php

Question

I have the following code:
if ($Type != "DEA" and $VA != "Allowed" and $VolSess != 1) {
$max_rows = max($CMSReg_num_rows);
if ($max_rows == 0) {
mail($to, $subject, $body);
header('Location: '.bloginfo('home_url').'/profile');
}
}
The problem I have is that that an email is sent despite the if-statement being false, and only an email is sent. The rest of the code is not executed, i.e. no redirect. And when I comment out the mail() function, it does not send the email.
And when I add this code:
if ($VA == "Allowed") {
echo "VA = " . $VA;
}
if ($VolSess == 1) {
echo "VolSess = " . $VolSess;
}
I get this output:
VA = Allowed VolSess = 1
So I know that the condition in the if statement is false.

Answer 1

AND has a different order of precedence compared to &&. So your expression does not evaluate as you expect it to.
("$Type" != "DEA" and $VA != "Allowed" and $VolSess != 1)
should be
(("$Type" != "DEA") and ($VA != "Allowed") and ($VolSess != 1))
or
("$Type" != "DEA" && $VA != "Allowed" && $VolSess != 1)
for it to work as you expect it. This is one of those tiny mistakes/bugs that's easy to overlook.

Answer 2

try do an else after...
elseif($VA == "Allowed"){}

Answer 3

Try using the WordPress wp_mail().
die; after header() and also add 302 as a second argument to the header() function.
Enable error reporting with ini_set('display_errors', true); error_reporting(-1); on top of your PHP code.
Tell us what you see after making these changes.

Answer 4

Try:
if ($Type != 'DEA' && $VA != 'Allowed' && $VolSess != 1)
{
$max_rows = max($CMSReg_num_rows);
if ($max_rows === 0)
{
mail($to, $subject, $body);
header('Location: ' . bloginfo('home_url') . '/profile');
}
}
EDIT
The above works, but so does the oringal question code... The problem is elsewhere.
<?php
$Type = 'foo';
$VA = 'Allowed';
$VolSess = 1;
if ($Type != 'DEA' and $VA != 'Allowed' and $VolSess != 1)
{
$max_rows = 0;
if ($max_rows === 0)
{
echo 'Orig True';
}
}
else
{
echo 'fine?';
}
if ($Type != 'DEA' && $VA != 'Allowed' && $VolSess != 1)
{
$max_rows = 0;
if ($max_rows === 0)
{
echo 'Second True';
}
}
else
{
echo 'fine?';
}
?>
Both print 'fine?' Implying your error is elsewhere in your code.