PHP logical tags and comparing symbols

[House 3]

Hi there,

 

I am going to show you a few "logical symbols" of programming languages.

First of all,

when you are coding something, and want to check or compare, there's no way around logical tags!

 

If you would like to check if something matches the other thing exaclty, then use:

==

in for example:

if($variable1 == $variable2)

 

 

If you would like to set a variable, then you will need to just simply use:

=

This sets something to some other thing.

 

 

If you would like to check if something is not another thing, then use:

!=

for example:

if($variable1 != $variable2)

 

 

If you would like to check if something is greater or smaller than something else:

>

<

 

if you would like to check if something is something OR something else, use:

||

between the two comparison items.

if($variable1 == 1 || $variable1 == 2)

 

 

if you would like to check if something is something AND something:

&&

for example:

if($variable1 == 1 && $variable1 == 2)

 

 

 

That was it for now, if you know something else, post it in here pls

[meijör 7]

To Add:

 

If you want to check whether a variable is lower or the same like something, you make it like this :

 

if ($a >= $b) { }...

[MinIGod 0]

You also have ===

=== means they are equal, and same type

example:

 

if (0 == false) {} // this is true. 0 == false. Different type (int vs. bool) but its == so type don't matter

if (0 === false) {} // This is not true. It is the same, but not the same type (int vs. bool).

if (1 == "1") {} // I believe this is true.

if (1 === "1") {} // This is defenetly NOT true.

Edited August 19, 2009 by MinIGod

[meijör 7]

tip :

int = whole numbers like 1,2,3 and stuff.

bool = true and false

without string formatting ( "TRUE" )

[kyote 14]

weird...