Manage WP options

wp_options_defaults.php

<?php
/**
 * WP Options Manager
 *
 * Description:
 * 		Useful ways to set/manage defaults when using arrays with WordPress options.
 * 		Covers restoring defaults, safely adding new data, and wiping data.
 * Prefix:
 * 		itaic_
 * Usage within templates:
 * 		$options = get_option('itaic_options');
 * 		echo $options['logo_text'];
 * 		echo $options['post_style'];
 * 
 */

add_action( 'admin_init', 'itaic_options_init' );

function itaic_options_init()
{
	// Registers your settings. Only required on first use, to add data to the DB, but there's no harm
	// in keeping it here
	register_setting( 'itaic_options', 'itaic_options' );

	// Run the the defaults handler function below
	itaic_options_defaults();
}

function itaic_options_defaults()
{ 
	// Get the options from the DB
	$itaic_options = get_option('itaic_options');

	// If there are no options, create an empty array to assist with the default options array handling below
	if(empty($itaic_options)) $itaic_options = []; 
	
	$itaic_options_default['logo_text'] = 'Hello World';
	$itaic_options_default['post_style'] = 'excerpts';
	$itaic_options_default['default_featuredimage'] = get_template_directory_uri().'/images/posts/featuredimage-default.png';
	$itaic_options_default['nav_style'] = 'right';
	$itaic_options_default['blog_title'] = 'Latest News';

	/*
	Comment or uncomment the code below.
	Block 2 is generally the only code you'll need to use.
	The other available choices can be very helpful too though.
	*/

	# 1 Create 'itaic_options', using the defaults (the data listed above)
	# ? Basically useless to us - use [4] to set up your data instead
	
		// add_option('itaic_options', $itaic_options_default);

	# 2 Add any new default data, but don't overwrite anything.
	# ? Use to add new data while preserving user changes
	
		$itaic_options = array_merge($itaic_options_default, $itaic_options);
		update_option('itaic_options', $itaic_options);

	# 3 Restore defaults, but KEEP all other data
	# ? Use to both add new data, and overwrite user changes to default data. Good with a 'Restore Defaults' button
	
		// $itaic_options = array_merge($itaic_options,$itaic_options_default);
		// update_option('itaic_options', $itaic_options);

	# 4 Restore defaults, and WIPE all other data
	# ? Use to both replace all option data with defaults, and clear all user data. Use for/to emulate fresh installs

		// update_option('itaic_options', $itaic_options_default);

	# 5 Delete the option entirely
	# ? Use to remove the option from the  database entirely- good for resets, testing and cleanup

		// delete_option('itaic_options');
}


// BONUS! This tiny function is a huge help when using options.

/**
 * Returns the value of $var if it's been set.
 * Otherwise, returns the if_unset value (defaults to false).
 *
 * Example:
 * 	echo issetor($options['name']);
 * 	echo issetor($options['name'], 'Joe Bloggs');
 *
 * @param  mixed   $var 	Var to check if it's been set or not
 * @param  boolean $if_unset Value to return if $var is unset (default: false)
 * @param  boolean $echo 	If true, echo the result
 *
 * @return mixed 		    Returns the value if it's been set, or the value of if_unset if unset (default: false)
 */
function issetor(&$var, $if_unset=false, $echo=false)
{
	$output = isset($var) ? $var : $if_unset;

	if($echo)
	{
		echo $output;
	}
	else
	{
		return $output;
	}
}

/*
Example usage with radio buttons:

<label>
	<input type='radio' name='itaic_options[post_style]' <?php checked( issetor($options['post_style']),'excerpts' ); ?> value='excerpts'>
	Show Excerpts
</label>
<label>
	<input type='radio' name='itaic_options[post_style]' <?php checked( issetor($options['post_style']),'fullposts' ); ?> value='fullposts'>
	Show Full Posts
</label>
*/

?>