I have a form with validation. I want to keep the values of the form when the validation failed using set_value in the textboxes. These textboxes are using array for the name.
<input type="text" name="speed[]" value="<?php echo set_value('speed[]') ?>" />
I believe that this is exactly what is pointed out by the documentation here. But when the form submitted, I get "Array to string conversion" error. I wonder how to implement this properly.
You need to add an index between the square brackets in set_value.
Assuming you're using a loop to print the textboxes, you can do the following:
<?php for ($i = 0; $i < 10; $i++) : ?>
<input type="text" name="speed[]" value="<?php echo set_value('speed['.$i.']') ?>" />
<?php endfor; ?>
And to validate/display errors for each field separately, set the validation rules in a loop:
for ($i = 0; $i < 10; $i++) {
$this->form_validation->set_rules('speed['.$i.']', 'Speed', 'required');
}
Then you can use the index in form_error:
<?php for ($i = 0; $i < 10; $i++) : ?>
<input type="text" name="speed[]" value="<?php echo set_value('speed['.$i.']') ?>" />
<?php echo form_error('speed['.$i.']'); ?>
<?php endfor; ?>
Credits to this answer: https://stackoverflow.com/a/17802145/3960296
<?php echo form_error('speed['. $i .']') ?> but it was not showing.