Student asked about <\/p>\n
Long reply:<\/p>\n
‘"virtual directory value relative from the root" of my website. ‘ may have several interpretations, and may have different values and meanings depending upon the context and the server environment.<\/p>\n
For example, you could use the PHP Magic Constant<\/p>\n
__FILE__<\/span><\/p>\n as in<\/p>\n Which, in the case say of this script<\/p>\n http:\/\/www.uvm.edu\/~waw\/archives\/dog.php<\/a><\/p>\n has the value of<\/p>\n \/…\/uvm.edu\/fs\/rack1e\/u\/staff\/waw\/public_html\/archives<\/p>\n Which isn’t so much the "virtual directory value relative from the root" as it is the absolute path of the directory containing the script. And, on www.uvm.edu, at least, a value that may change, since sometimes CIT Technical Resources groups shifts users from one physical disk (rack1e above) to another without warning — so beware if you ever hard-code this value in a script as opposed to obtaining it from the Magic Constant.<\/p>\n We have the following other $HTTP_SERVER_VARS<\/p>\n \/users\/x\/y\/xyzzzzz<\/p>\n where x is the first letter of the use’rs NetID, y is the second letter of the user’s NetID, and xyzzzzz is the user’s netid. But again, such conventions are only needed if and when you have to hard-code such a value in a script (usually when you are using some package like older versions of phpBB or wordpress or mediawiki that cat figure it out themselves).<\/p>\n I expect SCRIPT_FILENAME is what you think you are looking for. Then<\/p>\n Becomes<\/p>\n But now let’s put that in the context of the uvmsnow site. If your spaw code lives here<\/p>\n \/users\/u\/v\/uvmsnow\/public_html\/spaw<\/p>\n and the code you want to have USE spaw is here<\/p>\n \/users\/u\/v\/uvmsnow\/public_html\/admin<\/p>\n Then the code in, say, admin\/demo.php that reads<\/p>\n tries to include "\/users\/u\/v\/uvmsnow\/public_html\/admin\/spaw\/"<\/p>\n But that ain’t right — unless you put a copy of \/spaw\/ in admin. But then ,if you want to use spew from code in another folder, you have to do the same thing. Messy.<\/p>\n So, you could do something funky like this<\/p>\n The $i helps to keep the loop in check in case of typos, missing folders, etc.<\/p>\n","protected":false},"excerpt":{"rendered":" Student asked about I need to find the "virtual directory value relative from the root" ofmy website. Long reply: ‘"virtual directory value relative from the root" of my website. ‘ may have several interpretations, and may have different values and … Continue reading $virtual_directory_value = dirname( __FILE__ );<\/pre>\n
$HTTP_SERVER_VARS[‘DOCUMENT_ROOT’] but this is not my virtual root, but<\/span>
something else entirely (it is \/racka5\/http-data\/htdocs). <\/span>For example,<\/div>\n [SCRIPT_FILENAME] => \/users\/w\/a\/waw\/public_html\/archives\/dog.php<\/pre>\n
[SCRIPT_URI] => http:\/\/www.uvm.edu\/~waw\/archives\/dog.php<\/pre>\n
[SCRIPT_URL] => \/~waw\/archives\/dog.php<\/pre>\n
[REQUEST_URI] => \/~waw\/archives\/dog.php<\/pre>\n
[SCRIPT_NAME] => \/~waw\/archives\/dog.php<\/pre>\n
$HTTP_SERVER_VARS[SCRIPT_FILENAME] <\/span>is a preferred alternative to Magic Constant __FILE__, as it returns a fixed alias for the absolute path name of the script. In general, any users alias is formed using the convention<\/p>\n$spaw_dir = '\/spaw\/';<\/pre>\n
$spaw_root = $HTTP_SERVER_VARS['DOCUMENT_ROOT'].$spaw_dir;<\/pre>\n
$spaw_dir = '\/spaw\/';<\/pre>\n
$spaw_root = dirname($HTTP_SERVER_VARS['SCRIPT_FILENAME ']).$spaw_dir;<\/pre>\n
$spaw_dir = '\/spaw\/';<\/pre>\n
$spaw_root = dirname($HTTP_SERVER_VARS['SCRIPT_FILENAME ']).$spaw_dir;<\/pre>\n
include $spaw_root.'spaw_control.class.php';<\/pre>\n
$spaw_dir = '\/spaw\/';
$spaw_root = $HTTP_SERVER_VARS['SCRIPT_FILENAME'];
$i=0;
while (!file_exists($spaw_root.$spaw_dir) && $i < 10) {
$i++;
$spaw_root =dirname($spaw_root);
}
$spaw_root.=$spaw_dir;
include $spaw_root.'spaw_control.class.php';<\/pre>\n