True & False

[kinjokids]

Hey, more questions from me :eek: , anyway
can you use TRUE and FALSE in PHP (note: i am a begginer)

http://www.flashcartoons.org/php/adding.html

I am trying to make a simple plus and minus form
I named
Add "submit"
Subtract "submit2" in the html then it goes to the .php file

which has this code

<?php

if ($submit = TRUE) {
print ($number1 + $number2);

}

elseif ($submit2 = TRUE) {

print ($number1 - $number2);

}

?>

Now this dont work, when i submit either Add or Subtract it adds (+) the two input boxes together, how do i make it do either or by clicking on the specific button. (hope that made sense)

THANK YOU

[theeper]

If you are trying to find out if your variables have been set like this.

if (isset($submit)) {
print ($number1 + $number2);

}

or are you wanting to assign a string value of TRUE ?

if so, do it this way

if ($submit == "TRUE") {
print ($number1 + $number2);

}

[PHPdev]

Well first off I see a couple of things that you may want to look into...

the "=" operator is used for assignments as in
$x = 4;
the value of $x will now contain 4

the "==" operator is used for comparison
if ($y == 3)
comparing $y to the number 3

The way you have you add subtract form setup $submit will be assigned the string "Add!" and $submit2 will be assigned "Subtract!"

What you can do is see which button was pressed by using the isset() function.

if (isset($submit) == TRUE) {
// add numbers here
} elseif (isset($submit2) == TRUE) {
// subtract numbers here
}

And as always there is more than one way to skin a cat... you can also use the strcmp() (string compare) function

if (strcmp("Add!",$submit) == 0) {
// add numbers here
} elseif (strcmp("Subtract!', $submit2) == 0) {
// subtract numbers here
}

One final note, you can always use a die() to stop the execution of your program at any point. I use this a lot for debugging code, such as die($submit) wich will stop the execution and print out the value in $submit. If you want to do multiple varialbes you can always do a series of echo() and then a die()...

Hope this helps...

PHPdev

[kinjokids]

wow you guys are great, thanks so much
it worked!!!! php is a great language and i cant wait till im as good as the masters

just you wait 😃