Issue with in_array() not stopping multiple entries of the same value

[Rekson]

I'm currently making a small webapp for myself to make my job at work easier by automatically sorting / altering data. Right now I'm simply just trying to use the built in PHP function of in_array to check if a value already exists within a array. Right now it just keeps adding the same value in. The data is loaded from a CSV file the user chooses and parses the data. One the the variables is vendors we get product from so I want to pull each vendor name into a select option to be able to sort vendor name or block them from loading into my list.

if(in_array($vendor,$brand) == FALSE){ array_push($brand, $vendor); echo "<p>Adding: " . $vendor . "</p>";}

The above code is what I've got to check if the value is already in the array. $brand is set with $brand = Array(); and $vendor is loaded in from the CSV.

Results Now: Brand1, Brand1, Brand1, Brand1, Brand1, Brand1, Brand2, Brand2, Brand2, Brand2, Brand2, etc.

What i'd like: Brand1, Brand2, Brand3, Brand4, Brand5, etc.

I'm not super familiar with PHP just learning a bit to make this app so I can use it anywhere from a browser so I might be making a stupid mistake

[Coment]

That part of code seems fine, so it must be $vendor not getting properly set. Can you post the surrounding code that handles the data from the moment it's read from the file?

[Rekson]

Just overlooked the code again this morning... It was a stupid stupid error haha I was setting the $brand = Array(); inside of my while loop that reads the CSV file so I kept getting an empty array and what appeared to be multiple entries..

[Danneh]

Is there a reason your code is all on one line, or did you just do that when pasting it here? Also I'm not sure if you know, but since in_array only returns a boolean value, you can just do:
if(!in_array($vendor,$brand))

[Rekson]

It's a dumb habit of mine to where if I have a small if statement that just checks something small I'll write it on one line. Everything else I do format properly.

[Danneh]

PHP is more loose than strict, your "== false" would be true for "0 == false" and "array() == false", which is why PHP also has a triple equals comparison, which you need for functions like strpos