Set_select () function not working

Question

I used some codes as below

<select class="form-control selection" name="currency">
                        <option value="">select currency</option>
                            <option value="AED"<?php echo set_select('currency', 'AED'); ?> >AED</option>
                            <option value="SAR"<?php echo set_select('currency', 'SAR'); ?> >SAR</option>
                            <option value="MAD"<?php echo set_select('currency', 'MAD'); ?> >MAD</option>
                            <option value="TRY"<?php echo set_select('currency', 'TRY'); ?> >TRY</option>
                        </select>

But, unfortunately, it does not display the selected value after a form validation failed. Why is this base set_select () method not working? I used this in some other areas and everything works fine

Answer 1

Before using set_value(), set_select(), set_checkbox(), set_radio(), you must transfer these fields to check, even if it is not required / verified.

Answer 2

TL DR

When using auxiliary functions of the CodeIgnIter form, set_*there are only two cases :

• Form_validation .
• ( Form_validation).

set_*, , , , .

(set_ * )

set_* . , set_select():

: set_select($field = '', $value = '', $default = FALSE)

1.

set_select(), CodeIgniter _get_validation_object() .

_get_validation_object() object, FALSE ( ).

FALSE, set_select() $_POST, field , $value $default, , / selected="selected" ''.

, .

2.

, set_select() Form_validation::set_select() .

Form_validation _field_data, , / field (, ).

Form_validation::set_select() field in _field_data empty .

_field_data set_rules().

, , field, set_select().

.

, set_*.

Answer 3

:

set_select :

if (count($_POST) === 0)
{
    return ' selected="selected"';
} 

if (count($_POST) === 0)
{
    if ($default)
    {
        return ' selected="selected"';
    }
    else
    {
        return '';
    }
} 

Answer 4

As they said, choosing setignignign only works if you check these fields. If these fields are not required, then there is no need for re-population