declare an empty array of size 100 in codeigniter php - php

Question

I am developing an application in php using codeigniter for a workflow process.
Now i need to declare an empty array of size 100 or 200 with null value default..whenever workflow executed anyways values get stored in to that array dynamically..
I am having a array in my view like
if(isset($value)){
foreach ($value as $row) {
$wer[] = $row;
}
}
Now whenever workflow runs automatically values get stored in view using form_dropdown('perfpmself_1',$rate,$wer[0],'class="self"');
from the above format i use to load all values from $wer[0] to $wer[50]. All values will displayed properly...but if there is no values in database to load it to an array..it is throwing an error like
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: wer
Filename: views/performancepm.php
Can anyone suggests a solution for this to overcome this error on my view screen??
Please help..thanks in advance

Answer 1

You didn't initialize $wer before trying to assign a value to it:
if(isset($value)){
$wer = array();
foreach ($value as $row) {
$wer[] = $row;
}
}

Answer 2

Try:
$options = array_fill_keys(range(0,99),null);
echo form_dropdown('perfpmself_1', $options);

Answer 3

Just define wer globally. Also I'd use array_push, but thats just me. Keep it simple:
$wer = array();
if(isset($value)){
foreach ($value as $row) {
array_push($wer, $row);
}
}
if(empty($wer)){
//wer has values
}else{
// wer is not empty
}
In regards to your comments, as far as I know there is only one way to enforce the required field specifically in the codeIgniter framework:
$this->load->helper(array('form', 'url'));
$this->load->library('form_validation');
$this->form_validation->set_rules('username', 'Username', 'required');
From the CodeIgniter Guide
Otherwise youll have to enforce it using JavaScript or in your own PHP code to see if is an empty field:
if (isset($_GET['username'])){
//username isnt blank
}else{
//username is blank
}