Example of the required attribute for the Redux Framework.

Redux-required-arg-exampes.php

<?php


$options = array(
	'required' => array('id','equals',array( 1,3 ) ) // Multiple values
);

$options = array(
	'required' => array('id','equals', array( 1 ) ) // Single value
);

$options = array(
	'required' => array('id','equals', 1 ) // Also a single value
);

$options = array(
	'required' => array('id','equals', false ) // Means id = 0 or false or in the case of a switch, off
);

Redux-required-example.php

<?php
$options[] =
 array(
  'id'=>'switch-custom',
  'type' => 'switch', 
	'title' => __('Switch - Custom Titles', 'redux-framework'),
	'subtitle'=> __('Look, it\'s on! Also hidden child elements!', 'redux-framework'),
	"default" 		=> 0,
	'on' => 'Enabled',
	'off' => 'Disabled',
	),	
 array(
	'id'=>'switch-required',
	'type' => 'switch', 
	'required' => array('switch-custom', '=' , '1')
	'title' => __('Switch - With Hidden Items (NESTED!)', 'redux-framework'),
	'subtitle'=> __('Also called a "required" parent.', 'redux-framework'),
	'desc' => __('Items set with a required to this ID will hide unless this is set to the appropriate value.', 'redux-framework'),
	'default' => 0,
	),	
 array(
	'id'=>'patterns',
	'type' => 'image_select', 
	'tiles' => true,
	'required' => array('switch-custom', '=' , '0')
	'title' => __('Images Option (with pattern=>true)', 'redux-framework'),
	'subtitle'=> __('Select a background pattern.', 'redux-framework'),
	'default' 		=> 0,
	'options' => array(
					'1' => array('alt' => '1 Column', 'img' => REDUX_URL.'assets/img/1col.png'),
					'2' => array('alt' => '2 Column Left', 'img' => REDUX_URL.'assets/img/2cl.png'),
					'3' => array('alt' => '2 Column Right', 'img' => REDUX_URL.'assets/img/2cr.png'),
					'4' => array('alt' => '3 Column Middle', 'img' => REDUX_URL.'assets/img/3cm.png'),
					'5' => array('alt' => '3 Column Left', 'img' => REDUX_URL.'assets/img/3cl.png'),
					'6' => array('alt' => '3 Column Right', 'img' => REDUX_URL.'assets/img/3cr.png')
						),
	)
);

redux-required-possible-operators.md

• = / equals

  • Exact value of parent.

• != / not

  • Value of parent is not equal to this.

• > / greater / is_larger

  • Value is larger than the value of the parent. Must be an int/float value. No string comparisons will function.

• < / less / is_smaller

  • Value is less than the value of the parent. Must be an int/float value. No string comparisons will function.

• contains

  • String comparison. Checks to see if value is within the parent's value.

• doesnt_contains

  • String comparison. Checks to see if value is not within the parent's value.

• is_empty_or

  • Checks to see if the value of the parent is empty or equal to the current value. Same as equals, but also allows visibility if parent value is not set.

• not_empty_and

  • Checks to see if the value of the parent is not empty and equal to the current value. Same as not, but also hides visibility if parent value is not set.

Can you update this GIST to 3.2.0 version?
because required with multiple values no longer working
'required' => array('id','equals',array( 1,3 ) )

Bump for update. How do we make the required field correspond to multiple values now?

Got around this by using multiple "not" requirements. Since you can array-nest multiple conditions and the field only appears if all conditions are met, by using the "not" condition we essentially create a NAND instead of an OR. For a select option with 4 settings, you can get your option to show for settings 2 and 4 like so:

array(
    'id' => 'section-left-sidebar-start',
    'type' => 'section',
    'title' => __('Left Sidebar', 'redux-framework-demo'),
    'subtitle' => __('Adjust settings for the left sidebar region.', 'redux-framework-demo'),
    'indent' => true,
    'required' => array(
        array('opt-layout', 'not', 1),
        array('opt-layout', 'not', 3),
    ),                        
),

Is there a way to use required with section? I mean, display sections on condition?

Any way to change default values on condition?

@dovy
OR options will be appreciable.
https://gist.github.com/dovy/6478863#gistcomment-1226625