PHP if statement conundrum

Question

First of all, I understand why this is not working, but am not 100% sure on a decent way to fix it within my scenario.

I have 2 arrays, male genetics and female genetics. There's a loop that runs through and pairs them together, here's an example:

'Bell-Albino' => 'Bb'

Problem is, I need to do something like this:

if($gene != 'BB' || $gene != 'RR' || $gene != 'TT'){ echo 'Recessive Albino'; }

The conundrum is, if the $gene is BB for example, this will always return 'recessive albino' because the other 2 or statements are being matched.

The array has many key's and this code only needs to run on the above values, hence why I can't do a simple check on if they value is upper case. EE isn't an albino strain, only BB, RR and TT are.

I could do this as an elseif() condition but it would add an extra 10 lines or so and not sure if there is a better way.

Could you elaborate on your example? I feel like this probably has a simple solution however I'm not 100% sure what you're after. — Ankh
– Ankh, Commented May 18, 2016 at 7:36
I can't really follow you, to be honest. Of course they're no all set at the same time which is exactly the reason why you need && instead of || when using negative condition checks. Can you give an example of the elseif construct, then we can see how it can be simplified. — Emanuel Oster
– Emanuel Oster, Commented May 18, 2016 at 8:22

Victor Smirnov · Accepted Answer · 2016-05-18 07:45:54Z

The question is slightly confusing. But let me try to guess.

I think you are wanting to write something like this

$gene = 'Bb'; if (!in_array($gene, ['BB', 'RR', 'TT'])) { echo 'Recessive Albino'.PHP_EOL; } else { echo 'Non Recessive Albino'.PHP_EOL; }

If $gene is not in the given list we have recessive albino. Else we have may be non recessive albino.

Initially I suggested to use strtoupper but it seems like this is wrong and the case do make difference.

The string is output as Bb from using the parental genes. It takes B from the male and b from the female for example and then throws out Bb. So technically it's not in an array. This script is building a punnet square for calculating genetics so it's quite difficult to explain haha
Though as I re read your example this might work how I want, misread it the first time! I'll give it a go and let you know

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