Passing multiple callback in Code Igniter form validation rules - php

Question

I want to pass multiple callbacks in codeigniter form validation rules.... but only one of the callbacks work
I am using this syntax in my contoller
$this->form_validation->set_rules(
array(
'field' => 'field_name',
'label' => 'Field Name',
'rules' => 'callback_fieldcallback_1|callback_fieldcallback_2[param]',
'errors' => array(
'fieldcallback_1' => 'Error message for rule 1.',
'fieldcallback_2' => 'Error message for rule 2.',
)
),
);
and the callback functions are....
function fieldcallback_1 (){
if(condition == TRUE){
return TRUE;
} else {
return FALSE;
}
}
function fieldcallback_2 ($param){
if(condition == TRUE){
return TRUE;
} else {
return FALSE;
}
}
Someone please help me out with this problem.... any other solutions regarding passing multiple callbacks in form validation rules are also appreciated...

Answer 1

All validation routines must have at least one argument which is the value of the field to be validated. So, a callback that has no extra arguments should be defined like this.
function fieldcallback_1($str){
return ($str === "someValue");
}
A callback that requires two arguments is defined like this
function fieldcallback_2 ($str, $param){
//are they the same value?
if($str === $param){
return TRUE;
} else {
$this->form_validation->set_message('fieldcallback_2', 'Error message for rule 2.');
//Note: `set_message()` rule name (first argument) should not include the prefix "callback_"
return FALSE;
}

Answer 2

Maybe like this?
$this->form_validation->set_rules(
array(
'field' => 'field_name',
'label' => 'Field Name',
'rules' => 'callback_fieldcallback_1[param]'),
);
// Functions for rules
function fieldcallback_1 ($param){
if(condition == TRUE){
return fieldcallback_2($param);
} else {
$this->form_validation->set_message('callback_fieldcallback_1', 'Error message for rule 1.');
return FALSE;
}
}
function fieldcallback_2 ($param){
if(condition == TRUE){
return TRUE;
} else {
$this->form_validation->set_message('callback_fieldcallback_1', 'Error message for rule 2.');
return FALSE;
}
}