ym-options.php

<?php
/*
Plugin Name: YM Options Page
Plugin URI: https://yakub.xyz/
Description: The plugin shows you how to build an options page
Author: M Yakub Mizan
Version: 1.0.0
Author URI: https://yakub.xyz
*/

class YM_Options_Page {

	/**
	 * This is the place where we define our hooks
	 * They run when the class is instantiated. 
	**/
	public function __construct()
	{
		//hook the function that will call the add_options_page to add the options
		add_action( 'admin_menu', array($this, 'menu_callback') );

		if ( is_admin() )
		{
			add_action( 'admin_init', array($this, 'register_options') );
		}
	}

	public function menu_callback()
	{
		add_options_page( 'YM Options Page', 'Ym Options', 'manage_options', 'ym-options', array($this, 'menu_markup') );
	}

	public function menu_markup()
	{
		if ( !current_user_can( 'manage_options' ) )  {
			wp_die( __( 'You do not have sufficient permissions to access this page.' ) );
		}
	?>
		<div class="wrap">
			<h1>YM Options</h1>
			<form method="post" action="options.php"> 
				<?php settings_fields( 'ymoptions-group' ); ?>
				<?php do_settings_sections( 'ymoptions-group' ); ?>

				<table class="form-table">
			        <tr valign="top">
			        	<th scope="row">Enter Your Name</th>
			        	<td><input type="text" name="ymoptions_name" value="<?php echo esc_attr( get_option('ymoptions_name') ); ?>" /></td>
			        </tr>
			         
			        <tr valign="top">
			        	<th scope="row">Age</th>
			        	<td><input type="text" name="ymoptions_age" value="<?php echo esc_attr( get_option('ymoptions_age') ); ?>" /></td>
			        </tr>
			        
			        <tr valign="top">
			        	<th scope="row">Gender</th>
			        	<td>
			        		<select name='ymoptions_gender'>
			        			<option value=''> Select </option>
			        			<option value='male' <?php echo get_option('ymoptions_gender') == 'male' ? "selected=selected" : ' '?>> Male </option>
			        			<option value='female' <?php echo get_option('ymoptions_gender') == 'female' ? "selected=selected" : ' '?>> Female </option>
			        			<option value='other' <?php echo get_option('ymoptions_gender') == 'other' ? "selected=selected" : ' '?>>  Other </option>
			        		</select>
			        	</td>
			        </tr>
			    </table>
			    <?php submit_button(); ?>
			</form>
		</div>
	<?php
	}

	public function register_options()
	{
		register_setting( 'ymoptions-group', 'ymoptions_name' );
		register_setting( 'ymoptions-group', 'ymoptions_age' );
		register_setting( 'ymoptions-group', 'ymoptions_gender' );
	}
}


new YM_Options_Page();