PHP Varaibles

[wigz01]

When passing variables from an html form, I keep getting the following error for all of my variables:

Notice: Undefined variable: (my variable name) in c:\apache group\apache\htdocs\action.php on line 24

Is there something that I missed when I installed PHP? Thanks in advance ...

[wigz01]

If you took a look at this, thanks. I was able to figure this one out.

I needed to set "register_globals = on" in my php.ini file or code my php form action differently.

This does however, bring up another question. What type of security risks are involved with setting up php to register html form variables as globals? Thanks!

[jimson]

instead of turning register_globals = ON
why don't try to code in

$_POST["ITEMNAME"];

i think more flexible...

the undefined variable is because u turn the show error to all
error_reporting = E_ALL; display all errors, warnings and notices

if your php.ini file got line like this,
the change it to
error_reporting = E_ALL & ~E_NOTICE

this will eliminate the display of the notice.

[wigz01]

Thanks!

Do I post from the html form page or at the beginning of my PHP form action? Do you have a code example? Thanks again!!!

[jimson]

1.php

<form action="2.php" method="post">
<input type="hidden" name="t1" value="test 1">
<input type="hidden" name="t2" value="test 2">
<input type="submit" value="go">
</form>

2.php

// to process the incoming request
<?
if(isset($POST)){
if(sizeof($POST)==2){
echo "T1 Value is : ".$POST["t1"];
echo "T2 Value is : ".$POST["t2"];
}
}
?>

fairy easy right
u don't have to enable global to get things right....

sincerely,
Jimson Chang

[wigz01]

Jimson,

Looks easy enough ... thanks for taking the time to help me out!

[jimson]

1.php

<form method="post" action="2.php">
<input type="hidden" name="t1" value="apple t1">
<input type="hidden" name="t2" value="orange t2">
<input type="hidden" name="t3" value="banana t3">

<input type="hidden" name="item" value="t1,t2,t3">
</form>

2.php

<?
$item = explode(",", $POST["item"]);
for($i=0; $i<sizeof($item); $i++){
echo $POST[$item[$i]];
echo "<br>";
}
?>

[wigz01]

There seem to be many things you can do this way with loops, tables, etc. This will be very helpful! Thanks Again!

[chads2k2]

You can also do it this way...its the way I teach it in my class.

1.php

<form method="post" action="2.php">
<input type="hidden" name="t1" value="apple t1">
<input type="hidden" name="t2" value="orange t2">
<input type="hidden" name="t3" value="banana t3">
</form>

2.php

<?
echo "$t1";
echo "$t2";
echo "$t3";
}
?>

I do not do installs but never found a problem with this way yet. I could be wrong though. 🙂

[chads2k2]

I am really sorry. I am wrong. I found out that most hosts do set register_global=On In most cases. My way was ASSUMING the register_global is available to use. I am sorry for sticking my nose in here when I did not know the best practise for setting a box up. Take care and have a great day!

[torsoboy]

Ok, I understand that you can turn off the notices, but how can I get rid of the problems without turning off the notices (i am having the same problem as the original poster)? There must be a reason they are showing up.

[lnfreish]

if you want to get rid of the NOTICE without via close the error_report, you must define a variable before you use it.
such as:

$fp = fopen("file.txt","r");
while (!feof($fp)) {
   $output .= fread($fp,1024);
}
fclose($fp);

if your error_reporting = E_ALL and display_errors = On, you will see the NOTICE message of $output is Undefined variable. so you can use the code like:

$output = ""; //define $output

$fp = fopen("file.txt","r");
while (!feof($fp)) {
   $output .= fread($fp,1024);
}
fclose($fp);

/**************************************/
if you use a form submit data, I advice you use isset to varify the $variable,such as:

if (isset($_POST['name'])) {
    echo $_POST['name']
}