[SOLVED] What is the code to determine if a variable is holding anything? Null Empty

[jlgray48]

What is the php code to determine if a variable is null or empty?

 

 

[bobleny]

if ($variable == FALSE)

 

if (!isset($variable))

 

if ($variable == "")

 

This MIGHT work (Never tried):

if (!$variable)

[fert]

if(empty($var))

There are lots of ways

[jlgray48]

absolutely amazing, how did you do that

[bobleny]

There are lots of ways

 

Yes there are! Too many! I end up using about 3-4 different ways in one script. I will use clips from an old script, but the new one is using a different way... It becomes quite disgusting!

[jlgray48]

Can you help me with this code?

 

<?php

 

$Item1 = $_REQUEST[item 1];

$Item2 = $_REQUEST[item 2];

$Item3 = $_REQUEST[item 3];

 

$conn=mysql_connect("127.0.0.1", "odbc", "") ;

mysql_select_db("php012",$conn);

 

For ($i = 1; $i <=3 ; $i+=1) {

 

    While $Item.$i == " " {

 

$sql = "Update inventorytable set Itemquantity = Itemquantity -1 where ItemID = $Item.$i" ;

mysql_query($sql,$conn);

}

 

 

 

?>

 

[bobleny]

Based on your previous question, you don't want to use that:

While $Item.$i == " " {

 

You would want to use:

While $Item.$i == "" {

 

The space tells php that as long as $Item.$i equals a space do this...

 

Or I suppose you could replace the "" with any of the above suggestions such as FALSE...

 

Edit:

Also, for your for loop:

For ($i = 1; $i <=3 ; $i+=1)

 

you could use

For ($i = 1; $i <=3 ; $i++)

 

Instead.

 

$i++ is the same as $i=+1..

[jlgray48]

I think the $item.$i is incorrect can you take a look.

[bobleny]

Ooo.. I don't know how I missed this!

 

While $Item.$i == " " {

 

$sql = "Update inventorytable set Itemquantity = Itemquantity -1 where ItemID = $Item.$i" ;

mysql_query($sql,$conn);

}

 

should be this:

while ($Item.$i == "") {

 

$sql = "Update inventorytable set Itemquantity = Itemquantity -1 where ItemID = $Item.$i" ;

mysql_query($sql,$conn);

}

 

As far as the "$Item.$i" goes, I don't know what your trying to accomplish...

[bobleny]

Could you explain to me exactly what your trying to do, I might be able to help you better. I don't know anything about the SQL lite or what ever it is that your using....

[bobleny]

Cancel that I think I figured out what you wanted. Please check your other thread.