[UPHPU] testing multiple items in an if

[Dave Smith]

Wade Preston Shearer wrote:
>     if($var != 'a' || 'b')

It is valid syntax, but this condition will *always* be true, even if 
$var neither equals 'a' nor 'b'. The reason: the expression 'b' is 
considered true by PHP. You most definitely do not want to do this.

>     if($var != 'a' && $var != 'b')


This is what you really wanted, and it's not the same as the first bit 
of code. This condition is true if $var is neither 'a' nor 'b'.

I've often wished for syntax in C-style languages where you could do 
what you wanted in the first bit of code, but it'll never happen (in 
C-style languages anyway), because it'd be ambiguous to the 
compiler/interpreter.

--Dave