string in database row problem

[Anon]

I am trying this without success;

$string="fieldname";

later in script;

$fieldvalues=$row['$string'];

The problem lies in this part : ['$string']

How can I write this part using a string instead of just the fieldname?

Thanks

[matjaz]

$fieldvalues=$row[$string];

OR

$fieldvalues=$row[$$string];

i forgot :-) i hope one of those works...

[[deleted]]

it's
$fieldvalues=$row[$string];

The $$string means the value of the variable that has the same name as the value of $string.

$string='myvar';
$myvar='hello';
echo $$string;
outputs: 'hello';

[lawnmowerman]

Vincent and Matjaz have already answered your question, but I thought I'd add my $0.02 USD 🙂

When you place something inside single quotes, the parser does not do variable expansion or replacement.

You could probably use:

$fieldvalues=$row["$string"];

and have it work correctly since the parser will do the variable replacement.

-Rich

[[deleted]]

Actually, if you don't need to prepend/append any characters to the string, you don't need to quote the variable at all.

[lawnmowerman]

Well, you could not quote the variable and still prepend/append characters:

$fieldvalues = $row[$string . 'append'];

or

$field values = $row[ "prepend" . $string];

There are many roads to the same destination 🙂

-Rich