wc product timer

function.php

<?php
/**
 * Theme functions and definitions
 *
 * @link https://developer.wordpress.org/themes/basics/theme-functions/
 */

/* Display in vendor dashboard */
function add_custom_product_data_content_pob( $id, $product_obj, $post ) {
    $hh6 = get_post_meta( $id , '_custom_product_date', true );
	$hhd = get_post_meta($id , '_my_date_field', true );
	$hht = get_post_meta($id , '_my_time_field', true );
	$hht2 = get_post_meta($id , '_my_time_field2', true );
   ?>
   <div class="form-group">
        <label class="control-label col-sm-3 col-md-3" for="product_condition">Set Product availability time</label>
        <div class="col-md-6 col-sm-9">
            <select name="product_condition_value" id="product_condition_value" class="form-control regular-select">
				<option value="Everyday"
                        data-show="none" <?php echo( $hh6 == 'Everyday' )? 'selected' : '' ; ?>>Everyday</option>
                <option value="Weekdays"
                        data-show="date" <?php echo( $hh6 == 'On')? 'selected' : '' ; ?>>Weekdays</option>
                <option value="Weekends"
                        data-show="date" <?php echo( $hh6 == 'Weekends')? 'selected' : '' ; ?>>Weekends</option>
                <option value=""
                        data-show="date" <?php echo( $hh6 == '' )? 'selected' : '' ; ?>>Before date</option>
                <option value=""
                        data-show="date" <?php echo( $hh6 == '' )? 'selected' : '' ; ?>>After date</option>
                
	        </select>
			<div>
				<div>
			<label class="control-label col-sm-3 col-md-3" for="product_condition">Till</label>
            <input type="date" name="my_date_field" class="form-control time-set" value="<?php echo $hhd;?>"/>
				</div>
				<label class="control-label col-sm-3 col-md-3" for="product_condition">From</label>
			<input type="time" name="my_time_field" class="form-control time-set" value="<?php echo $hht;?>"/>
				<label class="control-label col-sm-3 col-md-3" for="product_condition">To</label>
			<input type="time" name="my_time_field2" class="form-control time-set" value="<?php echo $hht2;?>"/>
			Current date--<code><?php echo current_time( 'm/d/Y' ); ?></code>--
			</div>
        </div>
    </div>
   <?php
}
add_action( 'wcmp_afm_after_general_product_data', 'add_custom_product_data_content_pob',10,3);


/*
 Save Custom Tab content data.
*/
 
function save_custom_general_data( $product, $post_data ) {
	
if( isset($post_data['post_ID']) && isset($post_data['product_condition_value'])) {
	update_post_meta( absint( $post_data['post_ID'] ), '_custom_product_date', $post_data['product_condition_value']);
	}
if( isset($post_data['post_ID']) && isset($post_data['my_date_field'])){
update_post_meta( absint( $post_data['post_ID'] ), '_my_date_field', $post_data['my_date_field']);
}
	if( isset($post_data['post_ID']) && isset($post_data['my_time_field'])){
update_post_meta( absint( $post_data['post_ID'] ), '_my_time_field', $post_data['my_time_field']);
}
	if( isset($post_data['post_ID']) && isset($post_data['my_time_field2'])){
update_post_meta( absint( $post_data['post_ID'] ), '_my_time_field2', $post_data['my_time_field2']);
}
}
add_action( 'wcmp_process_product_object', 'save_custom_general_data', 100, 2 );

function wcmp_display_custom_field() {	
	 global $post;	
	// Check for the custom field value	 
	$product = wc_get_product( $post->ID );	 
	$title = $product->get_meta( '_custom_product_date' );	
	$date = $product->get_meta( '_my_date_field');
	$time = $product->get_meta( '_my_time_field');
	$time2 = $product->get_meta( '_my_time_field2');
  //Set Date And Time OF The countdown
	$todayDate =  date('Y-m-d');
	$d1 = strtotime("$date 00:00:00");
	$d2 = strtotime("$todayDate 00:00:00");
	$tsd = $d1-$d2;
	$tr = $d1 - time();
	$tdays = floor ($tr / 86400);
	$tminutes = $tsd /60;
	$thours = floor (($tr -$tdays * 86400)/3600);
	$mrn = 1440 - 60 * $thours - $tminutes;
	$hrm = $mrn / 60;
	//time travel
	$s = $tsd%60;
	$m = floor(($tsd%3600)/60);
	$h = floor($tsd / 3600);
		  

	if($tr > 0)
{
    echo "<h4>Available $title</h4><h5>from $time to $time2</h5> <p> $tdays day(s) $thours hour(s) left </p>";
}
else if ($date == "")
{
 echo "";
}
	else {
		add_filter( 'woocommerce_variation_is_purchasable', 'filter_is_purchasable', 10, 2 );
add_filter('woocommerce_is_purchasable', 'filter_is_purchasable', 10, 2);
function filter_is_purchasable() {
         return false;
    return is_purchasable;
};
	echo "<h4> Product Unvailable</h4>";
	}
}
add_action( 'woocommerce_after_add_to_cart_button', 'wcmp_display_custom_field' );