Get input box value to another input box with conditions - php

Question

I am trying to pass a value from a textbox to another textbox (Same window) with conditions, Lets say. If the value from the first textbox is 1 then the output on the other textbox will be 2, and if the first textbox is 2 then the output on the other will be 3 and so on so forth.
Here is what Ive done so far.
Text box 1:
<input type="text" name="basic_salary" value="<?php
if ($emp_salary->basic_salary <= 15999) {
echo $emp_salary->provident_fund = 120;
} elseif ($emp_salary->basic_salary >= 16000) {
echo $emp_salary->provident_fund = 1;
} else {
echo "Have a good night!";
}
?>" class="form-control">
and for the textbox 2:
<label class="control-label" >SSS </label>
<input type="text" name="provident_fund" value="<?php
if (!empty($emp_salary->provident_fund)) {
echo $emp_salary->provident_fund;
}
?>" class="form-control">
am using Codeigniter. Thank you!

Answer 1

I would do this in the controller before passing the data to the view.
// defaults
$content_data['basic_salary'] = $emp_salary->basic_salary;
$content_data['provident_fund'] = "";
// exception(s) - can be expanded
if ($emp_salary->basic_salary <= 15999) {
$content_data['provident_fund'] = 120;
}elseif ($emp_salary->basic_salary >= 16000) {
$content_data['provident_fund'] = 1;
}
$this->load->view('content', $content_data);
Then in your view do something like
<input type="text" name="basic_salary" value="<?php echo $basic_salary; ?>">
<input type="text" name="provident_fund" value="<?php echo $provident_fund; ?>">
Might need some tuning from your side.