Wordpress custom meta checkbox

<?php

/*
when specific value is set then it will set that's meta_value
    suppose value="1"
    // here meta_value has been set up 1

    like

    <input type="checkbox" id="myText" class="regular-text" name="myText" value="1" <?php if(get_post_meta($post->ID, 'myText', true)):?> checked <?php endif;?>>

    if meta value suppose in <input >

    value not set OR set

    like

    <input type="checkbox" id="myText" class="regular-text" name="myText"  <?php if(get_post_meta($post->ID, 'myText', true)):?> checked <?php endif;?>>

    then value set auto meta_value "on"

*/


/**
 * Register meta box(es).
 */
function wpdocs_register_meta_boxes() {
    add_meta_box(
        'meta-box-id',  // uniqueue id
        __( 'Featured Posts','customquery' ), // Title name and textdomain
        'wpdocs_my_display_callback',     // callback function
         array(
            'post'
         )  // post type
        );
}
add_action( 'add_meta_boxes', 'wpdocs_register_meta_boxes' );

/**
 * Meta box display callback.
 *
 * @param WP_Post $post Current post object.
 */
function wpdocs_my_display_callback( $post ) {
// Display code/markup goes here. Don't forget to include nonces!
?>
<label for="myText"><?php _e("Show Your Post As Featured Post","customquery");?><label/>
<input type="checkbox" id="myText" class="regular-text" name="myText" value="1" <?php if(get_post_meta($post->ID, 'myText', true)):?> checked <?php endif;?>>
<?php
}

/**
 * Save meta box content.
 *
 * @param int $post_id Post ID
 */
function wpdocs_save_meta_box( $post_id ) {
    // Save logic goes here. Don't forget to include nonce checks!
    if(isset($_POST["myText"])){
        update_post_meta($post_id, 'myText', sanitize_text_field($_POST['myText']) );
    }
}
add_action( 'save_post', 'wpdocs_save_meta_box' );


// Show / display this data anywehere you need/want
//echo get_post_meta($post->ID, 'myText', true);