[SOLVED] IF and using one or more logical operators?

[ifubad]

$a = "b";

if ($a != "b" || $a != "c") {
    echo "not equal";
}

 

I alway get mixed up on using one or more logical operators with an IF statement

 

$a is equal to "b" and should not echo. But it seems to be executing the second test when it should not. What am I doing wrong?

[kenrbnsn]

That "if" statement is saying

 

echo "not equal" if $a is not "b" or $a is not "c"

 

That is true, so the echo is being executed.

 

If you don't want it to echo, you want to use the "&&" operator

<?php
$a = "b";

if ($a != "b" && $a != "c") {
    echo "not equal";
}?>

Ken

[Flames]

That code seems pointless though as far as i can see it will never occur $a can never be b and c at the same time...

[jordanwb]

That code seems pointless though as far as i can see it will never occur $a can never be b and c at the same time...

 

Unless Erwin Schrödinger's got a hold of it.