[CyBerAliEn]

Got a question; don't remember how to do this.

Say I have the following code:

PHP Code:

<?php
$a = "hello";
$b = "goodbye";
$c = "blah blah user input";
$d = "other user input";

if ($d=="$a")
{
    echo "alligator";
}

if ($a==$c AND $d)
{
    echo "crocodile";
}
?>

The above is not supposed to make sense or anything but is just an example to refer to.

As you see in the second if statement, I want it to do something if "$a" is equal to "$c" and "$d". But I don't remember how you do the "AND" part (I know it isn't "AND", that is just there so you know what I'm trying to do ). Any help?


Thanks


Andrew

[brendandonhu]

Actually, in PHP, you can use AND or two ampersands (&&). But that second if is just checking that $a==$c and $d exists. You should also use single quotes unless double quotes are really necessary, this will speed up processing time.

PHP Code:

<?php
$a = 'hello';
$b = 'goodbye';
$c = 'blah blah user input';
$d = 'other user input'

if ($d==$a)
{
    echo 'alligator';
}

if ($a==$c AND $a==$d)
{
    echo 'crocodile';
}
?>

[punjabian263]

if ($a==$c AND $d)

or you can check as

if (($a==$c) AND $d)

The result will be true if $a and $c has same value and $d variable has any value.

[CyBerAliEn]

Processing time isn't really an issue, and frankly, the double quotes are merely just a habit.

So as I take it, if I had basically the following:

PHP Code:

<?php
if ($showamortization=="yes" AND $period=="yearly")
{
    echo "blah blah blah";
}
?>

Then "blah blah blah" would only be echoed if $showamortization was "yes" and period was "yearly". Correct?

Also a separate question: would the above work if "AND" was replaced with "OR" (obviously though, if either condition was true, it would process with OR; versuses AND, where both statements must be true)?

Also another question: can you have multiple AND's or OR's in a condition? Can you combine them, and if so, how does it process such a task (IE, what order)?

Thanks