WordPress-Form-Validation

WordPress Advanced Form Validation like CodeIgniter

Rules

Rule	Paramater	Example
required	No	required
is_email	No	is_email
min_word	Yes	min_word[2]
max_word	Yes	max_word[4]
is_numeric	No	is_numeric
min_length	Yes	min_length[10]
max_length	Yes	max_length[20]
less_than	Yes	less_than[10]
greater_than	Yes	greater_than[20]
in_list	Yes	in_list[apple,watermelon]
regex_match	Yes	regex_match[/regex/]
is_url	No	is_url
username_exists	No	username_exists
email_exists	No	email_exists

Set Fields

<?php
$fields = [
    'user_meta' => [
        [
           'field' => 'full_name',
           'label' => __('Full Name', ''),
            'rules' => 'required|min_word[2]'
        ],
	]
];

$validation = new Validation();
$validation->set_fields($fields);
?>

Set Custom Data

If you can set custom data instead of $_POST

$data = [
	'user_meta' => [
		'full_name' => 'Full name value'
	]
];
$validation->set_data($data);

Set textdomain for translation

$validation = new Validation();
$validation->set_textdomain('your_textdomain');

Run Validation

$fields = [];
$validation = new Validation();
$validation->set_fields($fields);
$validation->run_validation();

Get Validation Errors

$fields = [];
$validation = new Validation();
$validation->set_fields($fields);
$validation->run_validation();

## Errors
print_r($validation->validation_errors());

Custom Error Messages

$fields = [
    'user_meta' => [
        [
           'field' => 'full_name',
           'label' => __('Full Name', ''),
           'rules' => 'required|min_word[2]'
            'error_messages' => [
                'required' => __('%s is cannot be blank.', 'your_textdomain'),
		'min_word' => __('%s must be at least %d words.', 'your_textdomain')
            ]
        ],
    ]
];

You can use as function

function form_validation($fields = [], $data = [])
{
    $validation = new Validation();
    $validation->set_fields($fields);
    $validation->set_data($data);
    $validation->set_textdomain('your_textdomain');

    return [
        'status' => $validation->run_validation(),
        'errors' => $validation->validation_errors(),
    ];
}

// Use
$fields = [
    'user_meta' => [
        [
           'field' => 'full_name',
           'label' => __('Full Name', ''),
           'rules' => 'required|min_word[2]'
        ],
    ]
];

$validation = form_validation($fields);

## if validation is successful
if($validation['status']){
  // do something.
  // maybe you can save data to database (:
}else {
  // if validation is fail
  print_r($validation['errors']);
}