Need help on this Php If statement:If either is true,the other is not false

[Tikila]

Hi guys,
Hope you're all doing just fine . I'd be grateful if you you can help out with this:

if ( ($country != 'Canada') || ($country != 'United States') ) {

deny all,except these two countries(either one)
exit;
} 

Currently the code has to deny one or the other(whatever returns false). If am from Canada,am denied because am not from the United States(and vice versa).

I tried it with an array and xor but to no result. May be am too tired i can't see the obvious.

[John_Betong]

Try this:

    <?php
    echo '<dl>';
    $continent = array('Canada', 'United States', 'Brazil', 'Mexico');
    foreach($continent as $country):
        echo '<dt><br />Country: ' .$country .'<br /></dt>'; 

        if ( ($country === 'Canada') OR ($country === 'United States') )
        { 
            echo '<dd>';
            if ('Canada' === $country)
            {
                echo 'Denied because from <b>Canada</b> and not from the <b>United States</b>';
            }else{
                echo 'Denied because from <b>United States</b> and not from the <b>Canada</b>.';
            }
            echo '<br />deny either Canada OR United States'; 
            echo '</dd>';
        } 
        
        if ( ($country != 'Canada') AND ($country != 'United States') )
        { 
            echo '<dd>';
            echo 'NEITHER Canada NOR United States';
            echo '</dd>';
        } 
    endforeach;    
    echo '</dl>';
?>

.

[StarLion]

Hi guys,
Hope you're all doing just fine . I'd be grateful if you you can help out with this:

if ( ($country != 'Canada') || ($country != 'United States') ) {

deny all,except these two countries(either one)
exit;
} 

Currently the code has to deny one or the other(whatever returns false). If am from Canada,am denied because am not from the United States(and vice versa).

I tried it with an array and xor but to no result. May be am too tired i can't see the obvious.

Do the logic math.
If your word is.. "Banana"
IF...TRUE OR TRUE = TRUE.
If your word is "Canada"
IF...FALSE OR TRUE = TRUE.
If your word is "United States"
IF...TRUE OR FALSE = TRUE.

You dont want OR. Assuming your test to equal 1 when the word

1 1 1
1 0 0
0 1 0
0 0 0 (Impossible Case)
Is AND.

if ( ($country != 'Canada') && ($country != 'United States') ) { 

[guido2004]

http://en.wikipedia.org/wiki/De_Morgan%27s_laws

http://en.wikipedia.org/wiki/Boolean_logic

[StarLion]

Indeed. Couldnt remember the law name off the top of my head, hence the logic table. :P