[SOLVED] Dynamically creating SESSION variable from MySQL query

[DondeEstaMiCulo]

I apologize if this was already address previously, however my search netted 0 results...  :-\

 

I am trying to create list of $_SESSION variables (more like an array I guess) according to my MySQL search results, however they wouldn't carry over into any other pages until I manually specified the names and values.

 

For example:

$query = "SELECT * FROM users WHERE userid='123'";
$blah = mysql_fetch_array(mysql_query($query));

foreach($blah as $key => $value) {
    $_SESSION[$key] = $value;
}

 

Pretty simple, or so I thought.  But it didn't work. I had to manually specify:

$_SESSION['first_name'] = $blah['first_name'];
$_SESSION['last_name'] = $blah['last_name'];

before it would work. 

 

Any ideas on why this is?

 

Thanks in advance.

 

[SirChick]

<?php
while($blah = mysql_fetch_array(mysql_query($query)){
$_SESSION['first_name'] = $blah['first_name'];
$_SESSION['last_name'] = $blah['last_name'];
If($blah as $key => $value){
    $_SESSION[$key] = $value;
}
}
?>

 

 

not sure if the that if statement will work but the while loop and first 2 sessions should...

or have i mis-understood what you were asking for >.< ?

 

 

Also make sure EVERY PAGE has session_start(); at the TOP of the page... otherwise it won't work.. any page that uses session must have session_start(); before any session processing starts

[DondeEstaMiCulo]

<?php
while($blah = mysql_fetch_array(mysql_query($query)){
$_SESSION['first_name'] = $blah['first_name'];
$_SESSION['last_name'] = $blah['last_name'];
If($blah as $key => $value){
    $_SESSION[$key] = $value;
}
}
?>

 

 

not sure if the that if statement will work but the while loop and first 2 sessions should...

That's exactly what my problem is...  the $_SESSION statements work, but the $_SESSION[$key]=$value loop doesn't...  :-\

 

Any ideas why?

 

Thanks for your help!

 

Brian

[SirChick]

what is $key ? and what is $value.. echo them for me...

[DondeEstaMiCulo]

what is $key ? and what is $value.. echo them for me...

$key is whatever the MySQL field name is, and $value is the value contained therein.

 

Example:

$query = "SELECT * FROM users WHERE userid='36'";
returns:
+--------+------------+-----------+----------------------+
| userid | first_name | last_name | email                |
+--------+------------+-----------+----------------------+
|     36 | Joe        | Mama      | joe@example.com      |
+--------+------------+-----------+----------------------+

 

The userid, first_name, last_name and email are the $key, and 36, Joe, Mama, joe@example.com are the $value when you use ($blah as $key => $value).

The array would look something like this:

$blah['userid']=36
$blah['first_name']=Joe
$blah['last_name']=Mama
$blah['email']=joe@example.com

 

So basically, I just want to copy the keys and values into a new array (basically-speaking) called $_SESSION...

 

But I want the $_SESSION array to be constructed by my MySQL query and not manually.

 

Follow?

 

Thanks,

Brian

[DyslexicDog]

This is a shot in the dark but give it a try...

 

$_SESSION["$key"] = $value

[SirChick]

($blah as $key => $value)
   

 

If $key is a field name .... and $value is a number that wouldnt make sense for your checking...

 

because then your effectively asking:

if fieldname(a string of chars) is equal to or greater than a number?

 

but how can a word be have a form of value ?

[revraz]

<?php
$query = "SELECT userid, first_name, last_name, email FROM users WHERE userid = '36'";
$result = mysql_query($query) or die ("Error in query: $query. " . mysql_error());
$count=mysql_num_rows($result);

if ($count > 0) {
while ($row = mysql_fetch_row($result)) {
$_SESSION['uid'] = $row[0];
             $_SESSION['fname'] = $row[1];
             $_SESSION['lname'] = $row[2];
             $_SESSIONl['email'] = $row[3];
            }
}
?>

[DondeEstaMiCulo]

This is a shot in the dark but give it a try...

 

$_SESSION["$key"] = $value

Yeah, I tried that too but unfortunately it didn't work... 

Thanks though!

 

 

 

($blah as $key => $value)
   

 

If $key is a field name .... and $value is a number that wouldnt make sense for your checking...

 

because then your effectively asking:

if fieldname(a string of chars) is equal to or greater than a number?

 

but how can a word be have a form of value ?

When you use "=>" it sets the variable name as $key and its value as $value.  It's not a "equal to or greater than" statement, which would then be specified as >=.

 

 

 

<?php
$query = "SELECT userid, first_name, last_name, email FROM users WHERE userid = '36'";
$result = mysql_query($query) or die ("Error in query: $query. " . mysql_error());
$count=mysql_num_rows($result);

if ($count > 0) {
while ($row = mysql_fetch_row($result)) {
$_SESSION['uid'] = $row[0];
             $_SESSION['fname'] = $row[1];
             $_SESSION['lname'] = $row[2];
             $_SESSIONl['email'] = $row[3];
            }
}
?>

Thanks for the attempt, however this is what I'm trying to avoid.  I don't want to manually specify the $_SESSION names, I want them to be created as a result of my MySQL query.  The $_SESSION names should be the same as the field names, and their values should be the same as the field entries...

 

I might try a do...while loop and see if that has any affect.  :-\

 

 

 

Thanks for your help anyway,

Brian

[PFMaBiSmAd]

First of all, don't use a do ... while loop. The type of loop is not the problem. Accessing the column/index names in the data from the rows is what the problem is.

 

I have a question (before I work on code to solve this), if there is more than one row from the database, do you want each of the $_SESSION['column_name'] variables to be an array that gets the values from all the rows? Like this -

 

$_SESSION['column_name1'][0] = row 0 value for column name 1

$_SESSION['column_name1'][1] = row 1 value for column name 1

...

$_SESSION['column_name2'][0] = row 0 value for column name 2

$_SESSION['column_name2'][1] = row 1 value for column name 2

...

 

[PFMaBiSmAd]

If we assume that answer to the question about multiple rows is yes, then the following code works (tested on one of my databases) -

 

$query = "SELECT * FROM users WHERE userid='123'";
$result =  mysql_query($query) or die("Query failed: " . mysql_error());

while($row = mysql_fetch_assoc($result))
{
foreach($row as $key => $value)
{
	$_SESSION[$key][] = $value; 
}
}

 

If this does not work, you will need to define and show what exactly it is or is not doing.

[kenrbnsn]

I created a table on my site to match your example and the following sample code:

<?php
session_start();
echo '<pre>' . print_r($_SESSION,true) . '</pre>';
include('../dbconfig.php');
mysql_connect($dbhost, $dbuser, $dbpass) or die ("Unable to connect!");
mysql_select_db($dbname);
$q = "select * from users where userid = 36";
$rs = mysql_query($q) or die("Problem with the query: $q" . mysql_error());
if (mysql_num_rows($rs) == 1) {
        $rw = mysql_fetch_assoc($rs);
        foreach ($rw as $key => $val)
                $_SESSION[$key] = $val;
}
?>

The first time you run it, nothing should show up in the $_SESSION array. If you reload the page, the $_SESSION array will be shown.

 

And this script can  be run at http://www.rbnsn.com/phpfreaks/db_sessions.php

 

Ken

[DondeEstaMiCulo]

Hey awesome!  You guys nailed it!

 

There will be only one $row returning, since users are unique...

 

So it looks like the only thing I was doing wrong was using mysql_fetch_array instead of mysql_fetch_assoc.

 

How come one fails and the other doesn't?  What's the difference between the two?

 

 

Thanks SO much for your help!

 

Brian

[DyslexicDog]

I created a table on my site to match your example and the following sample code:

<?php
session_start();
include('../dbconfig.php');
mysql_connect($dbhost, $dbuser, $dbpass) or die ("Unable to connect!");
mysql_select_db($dbname);
$q = "select * from users where userid = 36";
$rs = mysql_query($q) or die("Problem with the query: $q" . mysql_error());
if (mysql_num_rows($rs) == 1) {
        $rw = mysql_fetch_assoc($rs);
        foreach ($rw as $key => $val)
                $_SESSION[$key] = $val;
}
echo '<pre>' . print_r($_SESSION,true) . '</pre>';
?>

The first time you run it, nothing should show up in the $_SESSION array. If you reload the page, the $_SESSION array will be shown.

 

And this script can  be run at http://www.rbnsn.com/phpfreaks/db_sessions.php

 

Ken

 

Why not move the print_r statement below the session loop?