passing variable from one php file to another?

[Ko Ko]

Dear All,

I am wondering how to pass one variable from one php file to another
continuously or discontinuously.
For example, variable $a is declared in file1.php. I like to use that
variable in file2.php or file3.php where in file2.html, I won't use
that variable.
Looking forward to your help.

Thanks for your time and experience.

[Kristian Köhntopp]

Ko Ko wrote:

I am wondering how to pass one variable from one php file to another
continuously or discontinuously.

Files do not contain variables at all. They are just code on a disk, they
are static.

What you are referring to is either some kind of process (a file in
execution) or a session (a sequence of processes started by the same user).
In fact, usually the kind of question you ask is referring to sessions, and
PHP happens to have functions for that.

Try assigning your variable $a to $_SESSION["a"], and then look into the
contents of $_SESSION["a"] in the next "file".

Also, read up on http://php.net/session for more information on session
handling in PHP.
<?php
# I am file1.php
session_start(); # read up on session.auto_start
$_SESSION["a"] = 17;
?>

<?php
# I am file2.php
session_start(); # read up on session.auto_start
echo $_SESSION["a"];
?>

Kristian

[Erwin Moller]

Ko Ko wrote:

Dear All,

I am wondering how to pass one variable from one php file to another
continuously or discontinuously.
For example, variable $a is declared in file1.php. I like to use that
variable in file2.php or file3.php where in file2.html, I won't use
that variable.
Looking forward to your help.

Thanks for your time and experience.

Hi,

You can pass variables from one PHP script to another in different ways.

1) use SESSION
If you use SESSION, you can easily store a value in it and retrieve it from
another PHP script.
script1.php
// sets and stores the variable
$a = 42;
$SESSION["myNumber"] = $a;

From script2.php:
echo "myNumber is $a";

2) POST the value to script2.php
If script1.php does NOT produce any output, and just want to call
script2.php, you can post to script2.php.

Remember that sccript1.php should stop doing anything that is relevant after
redirecting the browser to script2.php

You can also use querystring to pass information to script2.php (which is
easier)

From script1.php:
$a = 42;
$newLocation = "http://www.yoursite.org/script2.php?a=$a";
header ("Location: $newLocation");
exit;

From script2.php:
$a = "unknown";
if (isset($_GET["a"])) {
$a = $_POST["a"];
}

The above example uses $_GET. $_GET is called a superglobal and it contains
all name/value pairs found on the url (after the ?).

Note that if you need/want to pass information using POST, you must send a
form with method="POST", or use CURL. (See www.php.net for details)
In that case the superglobal $_POST will contain all name/value pairs.

Hope this helps.

Good luck!

Regards,
Erwin Moller

[Ko Ko]

Dear Friends,

Thanks for your contributions.

It really help me to the way.

With Regards,

Ko Ko