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php and query string

Creamy Goodness

hey guys, totally new to php but coming from perl.

i have a logout.php that basically unsets all $_SESSION variables that i've set and redirects to an index.php with a query string like so index.php?message=logged out successfully.

now back in the index.php page i'd like to display a message to the user saying that they have just logged out.

since i'm coming from perl i'm mad into regular expressions and could easily do a regex on $_SERVER but i fear there may be a much more easier way of getting the message variable from the query string. $_GET doesn't work as it hasn't been sent by a html form i presume.

i know php is great for these global arrays eg $_SERVER and $_SESSION but is there one that holds all the variables from the query string?

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daymobrew

Cremo wrote:

$_GET doesn't work as it hasn't been sent by a html form i presume.

It will work for the example url you provided. Maybe use 'index.php?message=loggedout' and then your index.php will have something like:
[PHP]if ( defined( $_GET == 'loggedout' ) ) {
echo '<p>You have been logged out.</p>';
}[/PHP]

Adam

Google for the php $_POST and $_GET variables and all shall be revealed.

GoneShootin

Cremo wrote: »

$_GET doesn't work as it hasn't been sent by a html form i presume.

$_GET will work fine in this case as it doesn't require any submit to a form for it to be displayed at the target page. $_GET will check the URL and handle the paramaters after the "index.php?" appropriately.

As $_GET and $_POST are arrays, to debug you can always use something like:

print_r($_GET);

This will print the contents of a $_GET array and help you debug...

Show us your code and it will make it easier to sort it out.

Creamy Goodness

oops i made a bad noob mistake.

i had the redirect as index.php?msg=loggedout and was using $_GET in the index.php.

:pac:

GoneShootin

It happens to everyone

I've wasted too much time on different occasions trying to troubleshoot what seemed a complicated problems only to find that it was something as trivial as an incorrectly spelled variable.

daymobrew

GoneShootin wrote: »

only to find that it was something as trivial as an incorrectly spelled variable.

The lack of variable declaration and verification is one of the things I feel is lacking in PHP. In perl 'use strict' and 'use warnings' go a long way to preventing such trivial errors.

Is there anything similar in PHP?

Webmonkey

daymobrew wrote: »

Is there anything similar in PHP?

Yep

http://us3.php.net/error_reporting

Creamy Goodness

daymobrew wrote: »

The lack of variable declaration and verification is one of the things I feel is lacking in PHP. In perl 'use strict' and 'use warnings' go a long way to preventing such trivial errors.

Is there anything similar in PHP?

aye strict and warnings have save me - no scratch that, my employer - many hours

Webmonkey wrote: »

Yep

http://us3.php.net/error_reporting

cool handy to know.