problem on require

[Yan]

Hi,

I would want to combine all my dabase related function in a single
php script , say mydbfunction.php , and i want to configure the general db info in a 'common.inc' file and add a line like
<?PHP
require 'common.inc';
require 'db.php';

function db_login
{
....
}

function db_new
{
...
}

...

However , the required para never pass to the functions. But once , i move require 'common.inc' inside each function {} , it
works fine.

Any shortcut to work it out ?

Thanks in advance for your help!!!

[matto]

hi,

looks like a variable scope problem.

in php, (user defined) variables declared outside functions are unknown to the functions unless

• they are passed as a parameter to the function, or
• they are declared global WITHIN the function

the latter is a very php specific behaviour.

[exception: some system variables as $_SERVER which are really global]

if you place the require('common.inc') within each function, thats just as good as if you pasted the variable declarationss/assignments into each function - so the values are there, as LOCAL variables (only known to the function).

a better way:
if your function uses (e.g.) $DBNAME, place

global $DBNAME;

inside the function, and the one "outside" variable is known. (but only in this one function where you've set it global).

hth,
matto

[Yan]

matto,

Thanks , now i understand how PHP handles globle$ declearation.

rgd.yan