PHP nested if conditions

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.

Dan · Accepted Answer · 2012-10-02 02:35:42Z

3

= 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.

answered Oct 2, 2012 at 2:35

Dan

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1 Comment

Zachary J Rollyson Over a year ago

Well I feel a bit silly; tried checking them as != false earlier but didn't take it all the way through the function. Thank you much for the clearing up, Dan.

Adam Plocher · Accepted Answer · 2012-10-02 02:34:00Z

2

You need to use two equal signs == instead of =. Also, your variables need to have $ in front of them. And your "or" should be ||.

The logic is ok.

It should look like this:

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

answered Oct 2, 2012 at 2:34

Adam Plocher

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3 Comments

Brad Over a year ago

Technically, he can use or, but I agree, it would be ridiculous to do so.

Adam Plocher Over a year ago

I did not know that. Learn something new everyday :). php.net/manual/en/language.operators.logical.php

Adam Plocher Over a year ago

It's pretty inconsistent with PHP's C-like syntax.

Yogesh Suthar · Accepted Answer · 2012-10-02 02:37:30Z

0

change condition

if (($t1 == true && $b1 == true) or
($t1 == true && $b2 == true) or
($t2 == true && $b1 == true) or
($t2 == true && $b2 == true)
)

= is assignment operator == is comparison operator.

answered Oct 2, 2012 at 2:37

Yogesh Suthar

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