variable visibility when using <a href></a>

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variable visibility when using <a href></a>

От:
"Jules Alberts" <jules.alberts@arbodienst-limburg.nl>
Дата:
hello world,

sorry if this is off topic, but the question arose when i was buidling 
a test system with PHP4 / postgresql.

i want a user to enter a user ID and password in order to make a non-
permanent database connection. so the application (that consistes of 
several PHP and HTML files) should remember the values in variables.

a logical approach seemed to be global variables, however, this doesn't 
work when new pages are generated. in this small example:

	// this is file main.php
	";
	  $password="fubar";
  	echo "password is: \"$password\"
";
	  echo "sub";
  	echo "";
	?>

	// this is file sub.php
	";
	  global $password; // doesn't work
  	echo "password is: \"$password\"
";
	  echo "";
	?>

the variable $password is not visible in sub.php. i guess this is 
because the href link creates a new page, a fresh start. still i want 
$password to be visible in sub.php. what is a good, safe way to do 
this? setting serverside environment variables sounds dangerous. and i 
would like to avoid cookies (unless it's the only way). i thought about 
include_once(), but you can't call that from a link. or can you?

how is this normally done? TIA for any tips!

-- 
Jules Alberts

Re: variable visibility when using <a href></a>

От:
"Jules Alberts" <jules.alberts@arbodienst-limburg.nl>
Дата:
On 29 May 2002 at 10:08, David C. Brown wrote:
> How about using a session?
> 
> session_start()
> $password="fubar";
> session_register("password");
> 
> 
> then on the next page (sub.php) call session_start(); again and 
> $password will become visable.
> 
> see http://www.php.net/manual/en/function.session-start.php
> 
> Dave

thanks Dave, i didn't know the concept of sessions. i had a google on 
the subject, i guess using $_SESSION would be the safest approach. i'll 
have a good look at it first before using it, the password stored will 
give access to a database with privacy-sensitive data, so safety is 
very important.

-- 
Jules Alberts

Re: variable visibility when using <a href></a>

От:
"David C. Brown" <dbrown@centennialwines.com>
Дата:
How about using a session?

session_start()
$password="fubar";
session_register("password");


then on the next page (sub.php) call session_start(); again and 
$password will become visable.

see http://www.php.net/manual/en/function.session-start.php

Dave

Jules Alberts wrote:

>hello world,
>
>sorry if this is off topic, but the question arose when i was buidling 
>a test system with PHP4 / postgresql.
>
>i want a user to enter a user ID and password in order to make a non-
>permanent database connection. so the application (that consistes of 
>several PHP and HTML files) should remember the values in variables.
>
>a logical approach seemed to be global variables, however, this doesn't 
>work when new pages are generated. in this small example:
>
>	// this is file main.php
>	  	echo "";
>	  $password="fubar";
>  	echo "password is: \"$password\"
";
>	  echo "sub";
>  	echo "";
>	?>
>
>	// this is file sub.php
>	  	echo "";
>	  global $password; // doesn't work
>  	echo "password is: \"$password\"
";
>	  echo "";
>	?>
>
>the variable $password is not visible in sub.php. i guess this is 
>because the href link creates a new page, a fresh start. still i want 
>$password to be visible in sub.php. what is a good, safe way to do 
>this? setting serverside environment variables sounds dangerous. and i 
>would like to avoid cookies (unless it's the only way). i thought about 
>include_once(), but you can't call that from a link. or can you?
>
>how is this normally done? TIA for any tips!
>
>  
>
FAQ