Codeigniter using form validation function "matches" with sub-array POST

Question

Just started with CI last week and got this issue. What to put inside the matches function if I'm passing the form data as an array?

I use array in the html form to locate all input fields inside single array in case I want to pass user generated input such as multiple phone numbers or emails. So everything is placed in array such as this:

    <div>
        <label for="password">Password</label>
        <input type="password" name="input[password]" id="password" value="<?php echo set_value("input[password]")?>"/>
    </div>
    <div>
        <label for="password">Confirm Password</label>
        <input type="password" name="input[conf_password]" id="conf_password" value="<?php echo set_value("input[conf_password]")?>"/>
    </div>

Notice the *name="input[password]"*

The validation works like a charm for all except when I use the function matches:

$this->form_validation->set_rules("input[password]", "Password", 'required|matches[input[conf_password]]');

$this->form_validation->set_rules("input[conf_password]", "Confirm Password", 'required');

matches[input[conf_password]]

This will not work because after I checked the Form_Validation.php I found out that matches will take whatever string I put between the square brackets of matches and tries to fetch the value from $_POST directly.

CI codes:

/**
     * Match one field to another
     *
     * @access  public
     * @param   string
     * @param   field
     * @return  bool
     */
    public function matches($str, $field)
    {
        if ( ! isset($_POST[$field]))
        {
            return FALSE;
        }   
        $field = $_POST[$field];    
        return ($str !== $field) ? FALSE : TRUE;
    }

So by right there would be no such thing as $_POST[input[conf_password]].

I'm aware that I can solve this by using

custom validation function
compare directly $_POST["input"]["password"] === $_POST["input"]["conf_password"]

I'm not sure what I'm missing since everything in CI related to forms is working nicely with arrays, why wouldn't this function?

Actually it will return false in the if ! isset($_POST[$field]) — Mohammed Joraid
– Mohammed Joraid, Commented Aug 24, 2014 at 6:26
I was thinking of another way to write that, not relevant to your problem. — Ryan
– Ryan, Commented Aug 24, 2014 at 6:26

tomexsans · Accepted Answer · 2014-08-24 15:29:33Z

2

Yes, i have a similar problem and there is no way CI core input can solve that, I solved mine not by creating a custom callback function it clutters the controller often, but by extending the Form_validation class MY_Form_validation

then i created a function which i called matches_array then used as matches_array[inputkeyname---inputkeyvalue]

os you would write yours as

$this>form_validation>set_rules("input[password]","Password",'required|matches_array[input---conf_password]');

Here is the function as i remember it.

public function matches_array($str, $field)
{
    $field = explode('---',$field);
    if ( ! isset($theField = $_POST [$field[0] ][ $field[1] ]))
    {
        return FALSE;
    }  
    return ($str !== $theField) ? FALSE : TRUE;
}

EDIT

Put it on your app/libraries and name it MY_Form_validation, MY_ is what you defined in your config. anything you put in here will be automatically added to the rules.

class MY_Form_validation extends CI_Form_validation 
{

    public function __construct($rules = array())
    {
        parent::__construct($rules);
        $this->CI->lang->load('MY_form_validation');
    }

    //your custom functions
}

edited Aug 24, 2014 at 15:29

answered Aug 24, 2014 at 15:08

tomexsans

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2 Comments

Mohammed Joraid Over a year ago

+1 seems like a good idea. Where did you put your MY_CI_Input?

tomexsans Over a year ago

look at my edit, i have a similar answer here stackoverflow.com/questions/21046166/… sorry it was CI_Form_validation not CI_Input i changed my answer

Petter Friberg · Accepted Answer · 2016-10-03 06:59:57Z

0

You can Edit MY_Form_validation

public function matches($str, $field)

    {
        return isset($this->_field_data[$field], $this->_field_data[$field]['postdata'])
        ? ($str === $this->_field_data[$field]['postdata'])
        : FALSE;
    }

edited Oct 3, 2016 at 6:59

Petter Friberg

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answered Oct 3, 2016 at 6:58

Hai Quan

1

1 Comment

Mohammed Joraid Over a year ago

Did you actually run this code or your just pulled it out of your head?

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