Posted by J.O. Aho on 01/05/07 14:18

Anne Bos wrote:
> On 5 Jan 2007 03:53:25 -0800 wrote "Captain Paralytic"
> <paul_lautman@yahoo.com>:
>
>> Anne Bos wrote:
>>
>>> In a database about houses I want the visitor to make a choice by
>>> typing in an address. As a result the database presents one or more
>>> adresses according to the input. So far so good.
>>>
>>> However, when arriving on this page I want to present a greeting and
>>> some instructions. So the page starts with:
>>> <?php
>>> if (!isset ($_POST['address'])) {echo "Welcome, Instructions etc.";}
>>> ?>
>>>
>>> In spite of this I always get a list of all addresses, perfectly as I
>>> want to present them AFTER the input.
>>> What might I do wrong, what is it I'm overlooking?
>>> Any suggestion is appreciated.
>> Is the rest of the code in an "else" block, or will is execute
>> regardless of whether $_POST['address'])) is set?
>
> To get rid of this situation I made an 'else' block with a code that
> is checked when results are coming. But I thought that this should not
> be necessary as in the beginning there should be no input is
> POST['address']

'If' don't work like that by itself, it just allows or denies something to be
done when the program is at the if-statement. And everything after the 'if' is
executed too. Of course you can make the program to stop inside an 'if'


<?PHP
function testsome($something,$somethingelse) {
if($something==$somethingelse) {
echo "something and somethingelse are the same\n";
return;
}

echo "something isn't somethingelse\n";
}

echo "first test: ";
testsome(1,1);
echo "second test: ";
testsome(1,2);
?>

You shoudl get an output that looks like:
first test: something and somethingelse are the same
second test: something isn't somethingelse

inside functions 'return' is a good way to stop execute things in program,
while on your page 'exit' had been a better option.

--

//Aho

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