如果条件，PHP嵌套

Question

What I'm trying to achieve is a nested condition like if ((a = true && b = true) or (c = true && d = true)) {...}. This doesn't seem to be working for me.

To further explain: I have two variables in what we could call a 'top', and two variables in what we could call a 'bottom'. What I need to do is execute code if variables are true in both 'top' and 'bottom'.

To more succinctly illustrate:

if ((t1 = true && b1 = true) or
    (t1 = true && b2 = true) or
    (t2 = true && b1 = true) or
    (t2 = true && b2 = true)
) {
    ...do some stuff...
}

I'm tempted to call it 'conditional statement for lattice problem'... except it isn't really a lattice problem... but it does sort of look like a lattice if you drew it |X| ... s'yeah, you're amazing if you can tell me a good way to do this, and you're super amazing if you can tell me what I ought to call it.

Answer 1

= is used for assignment, == is used to test for equality, === is used to test for equality and equal types. You need to use either == or ===, depending on whether t1, t2, b1, b2 are already boolean or something else. Also the stuff that Adam said, except that or is perfectly valid.