small blog help needed passing data

[eluser]echo sara[/eluser]
I am able to retrieve data but i get errors.

A PHP Error was encountered

Severity: Warning

Message: Missing argument 1 for Entry::entrytest()

Filename: controllers/entry.php

Line Number: 19

Controller line 19

Code:

function entrytest($data) {

A PHP Error was encountered

Severity: Notice

Message: Undefined variable: row

Filename: models/entrymodel.php

Line Number: 17

Model like 17

Code:

foreach($data_retrive->result() as $row){

A PHP Error was encountered

Severity: Notice

Message: Undefined variable: data

Filename: controllers/entry.php

Line Number: 25

Controller line 25

Code:

if($data > 0){

I don't think i scripted it correctly. Can you review the script above in my other post and see if that looks correct.

Thanks

Sara