passing Vars?

[Richard Ragon]

Hows does the passing variables from page to page work?

Specifically, when you type in a URL like:

http://www.someurl.com/test.php?someVar=20

How does the next page get, and use the variable?

Sorry for the dumb question..

Thanks

-Richard

[Kevin Thorpe]

Re: passing Vars?

Richard Ragon wrote:
[color=blue]
> Hows does the passing variables from page to page work?
>
> Specifically, when you type in a URL like:
> http://www.someurl.com/test.php?someVar=20
>
> How does the next page get, and use the variable?[/color]

$_GET['someVar'] would be set to 20
$_POST[] holds values from a POSTed form
both are merged together in $_REQUEST[]

.....unless you have an old version of php with register_global s turned
on in which case:
$someVar would be set to 20
....but I'd try not to use that anymore

[Eric Kincl]

Re: passing Vars?

Kevin Thorpe wrote:
[color=blue]
> Richard Ragon wrote:
>[color=green]
>> Hows does the passing variables from page to page work?
>>
>> Specifically, when you type in a URL like:
>> http://www.someurl.com/test.php?someVar=20
>>
>> How does the next page get, and use the variable?[/color]
>
> $_GET['someVar'] would be set to 20
> $_POST[] holds values from a POSTed form
> both are merged together in $_REQUEST[]
>
> ....unless you have an old version of php with register_global s turned
> on in which case:
> $someVar would be set to 20
> ...but I'd try not to use that anymore[/color]

Also, remember that GET, aka the way you have it (test.php?someV ar=blah),
isn't the best way of doing things all the time. I find it great for
specifying the page you want to be on (ie: news.php?page=a rchives), and
this is how it should be used, but if you are working with form data, I
would suggest always using the POST method, as it 1. can handle more data,
and 2. hides the data from the user and makes it harder to spoof.


-Eric Kincl

[Kevin Thorpe]

Re: passing Vars?

Eric Kincl wrote:[color=blue]
> Kevin Thorpe wrote:
>
>[color=green]
>>Richard Ragon wrote:
>>
>>[color=darkred]
>>>Hows does the passing variables from page to page work?
>>>
>>>Specifically , when you type in a URL like:
>>>http://www.someurl.com/test.php?someVar=20
>>>
>>>How does the next page get, and use the variable?[/color]
>>
>>$_GET['someVar'] would be set to 20
>>$_POST[] holds values from a POSTed form
>>both are merged together in $_REQUEST[]
>>
>>....unless you have an old version of php with register_global s turned
>>on in which case:
>>$someVar would be set to 20
>>...but I'd try not to use that anymore[/color]
>
>
> Also, remember that GET, aka the way you have it (test.php?someV ar=blah),
> isn't the best way of doing things all the time. I find it great for
> specifying the page you want to be on (ie: news.php?page=a rchives), and
> this is how it should be used, but if you are working with form data, I
> would suggest always using the POST method, as it 1. can handle more data,
> and 2. hides the data from the user and makes it harder to spoof.[/color]

Basically use GET for navigation and things without side effects.
Anything which will write to your database should use POST.

Imagine a page listing every record in your database with a 'delete'
link next to it. Along comes Googlebot to index your site and merrily
deletes every record you had. Bots do not (to my knowledge) ever use POST.