(beginner) - Setting up predefined var

[kade119]

Hey guys,

 

I'm trying to setup a variable for my url so i don't have to type the absolute path to my files in the header or anywhere else or re-type them when loading site to new domain.

 

what i have so far

 

 

var $myurl = 'http://www.domainname.com';

 

any assistance on implementing this and coding it properly will be appreciated

 

thanks

[Garethp]

No need. Check this out

 

If two files a.php and b.php are in the same folder, you can have

 

<?php
header('Location: b.php');
?>

 

Will still send him to b.php, no matter what URL it is. Basically, PHP uses relative paths just as well as absolute paths (Well, it might make a 0.01 second execution time difference)

[mattal999]

I think he means like a defined variable usable site-wide. Something like this:

 

includes/define.php:

<?php

$base = 'http://www.domainname.com/';

?>

 

index.php:

<?php

include("includes/base.php"); // I always put includes in a directory. You don't have to.
echo $base;

?>

[Philip]

No need. Check this out

 

If two files a.php and b.php are in the same folder, you can have

 

<?php
header('Location: b.php');
?>

 

Will still send him to b.php, no matter what URL it is. Basically, PHP uses relative paths just as well as absolute paths (Well, it might make a 0.01 second execution time difference)

 

That's technically invalid for a header, but only because of HTTP specs. From the manual: header

Note: HTTP/1.1 requires an absolute URI as argument to » Location: including the scheme, hostname and absolute path, but some clients accept relative URIs. You can usually use $_SERVER['HTTP_HOST'], $_SERVER['PHP_SELF'] and dirname() to make an absolute URI from a relative one yourself:

<?php
/* Redirect to a different page in the current directory that was requested */
$host  = $_SERVER['HTTP_HOST'];
$uri   = rtrim(dirname($_SERVER['PHP_SELF']), '/\\');
$extra = 'mypage.php';
header("Location: http://$host$uri/$extra");
exit;
?>

[Garethp]

I think he means like a defined variable usable site-wide. Something like this:

 

includes/define.php:

<?php

$base = 'http://www.domainname.com/';

?>

 

index.php:

<?php

include("includes/base.php"); // I always put includes in a directory. You don't have to.
echo $base;

?>

 

But why? I've never seen an abolute code that couldn't be made relative

[kade119]

nice, quick responses - i hope to learn a lot from this forum.

 

is it a bad form to put

 

<?php

 

$base = 'http://www.domainname.com/';

 

?>

 

<link href="<?php '$base' ?>/styles.css" rel="stylesheet" type="text/css" />

 

is that how i would code it?

 

i'm trying to make my web sites a bit more dynamic and a lot easier to edit after it's developed

 

recommendations on books to?

 

thanks guys

[Philip]

Just do:

<link href="styles.css" rel="stylesheet" type="text/css" />

[kade119]

okay.. i think i'm confusing myself

 

any recommendations  on a book that teaches how to build dynamic web sites?

[kade119]

the reason for this would be that my header.php file is an include and i have many pages that are in sub folders so instead of dropping in a the stylesheet or an other javascript file into that folder everytime, i could have $base_url/stylesheet.css etc.. 

[Philip]

Then make it dynamic by using $_SERVER['HTTP_HOST']

 

Try running this simple script:

<?php
echo 'My domain is: '.$_SERVER['HTTP_HOST'];
?>