set_select() not working in codeigniter framework - php

Question

I want the select box show the same value before the from submit after the redirection in this code $cat value come to the session i am not using validation rule for select box i want only the select box not change after the redirection
Select Leave Category...
leave_category_id ?>"
<?php echo set_select('leave_category_id', $cat, true); ?>> <?php echo $v_category->category ?> </option>
<?php endforeach;
?>
</select>

Answer 1

Try
<select name="leave_category_id" class="form-control" onchange="check_leave_category(this.value)" required >
<option>Select Leave Category...</option>
<?php foreach ($all_leave_category as $v_category) :
// Using short tag
//$v_category->leave_category_id == $cat ? $selected = 'selected' : $selected = '';
// without using short tag
if($v_category->leave_category_id == $cat) $selected = 'selected'; else $selected = '';
?>
<option value="<?php echo $v_category->leave_category_id ?>" <?php echo $selected?> > <?php echo $v_category->category ?> </option>
<?php endforeach;
?>
</select>

Answer 2

There are two things to keep in mind: First you have to use the validation class to be able to use the set_select() function. Second you have to pass the database information to that function, like this:
<select name="myselect">
<option value="one" <?php echo set_select('myselect', 'one', ($model->selection == 'one')); ?> >One</option>
<option value="two" <?php echo set_select('myselect', 'two', ($model->selection == 'two')); ?> >Two</option>
<option value="three" <?php echo set_select('myselect', 'three', ($model->selection == 'three')); ?> >Three</option>
</select>
If $model->selection is two, then the second option will be selected in the example above.
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