Woo-commerce Booking - Fetch all available bookings based on Time Range - wordpress

Question

I'm trying to fetch bookings based on time availability in wocommerce bookings by passing the time selection in below format:
2019-08-26 08:00 - 2019-08-26 11:00
$available_blocks = $booking_form->product->get_available_blocks( array(
'blocks' => $blocks_in_range,
'from' => $from,
'to' => $to));
foreach ( $available_blocks as $check ) {
if ( true === $booking_form->product->check_availability_rules_against_date( $check, '' )){
//Custom Added to fetch only blocks in selected range
if( $from >= reset($available_blocks) && $to <= end($available_blocks)){
$matches[] = $post_id;
break; // check passed
}
}
}
But, it's only working when I pass time in Hour only format(10:00 AM), When I add minute(10:30 AM) it is not returning any available bookings.
Full function for reference.
/**
* Get all available booking products
*
* #param string $start_date_raw YYYY-MM-DD format
* #param string $end_date_raw YYYY-MM-DD format
* #param int $quantity Number of people to book
* #param string $behavior Whether to return exact matches
* #return array Available post IDs
*/
function get_available_bookings( $start_date_raw, $end_date_raw, $quantity = 1, $behavior = 'default' ) {
$matches = array();
// Separate dates from times
$start_date = explode( ' ', $start_date_raw );
$end_date = explode( ' ', $end_date_raw );
// If time wasn't passed, define defaults.
if ( ! isset( $start_date[1] ) ) {
$start_date[1] = '00:00';
}
$start = explode( '-', $start_date[0] );
$args = array(
'wc_bookings_field_resource' => 0,
'wc_bookings_field_persons' => $quantity,
'wc_bookings_field_duration' => 1,
'wc_bookings_field_start_date_year' => $start[0],
'wc_bookings_field_start_date_month' => $start[1],
'wc_bookings_field_start_date_day' => $start[2],
);
// Loop through all posts
foreach ( $this->product_ids as $post_id ) {
if ( 'product' == get_post_type( $post_id ) ) {
$product = wc_get_product( $post_id );
if ( is_wc_booking_product( $product ) ) {
// Grab the duration unit
$unit = $product->is_type( 'accommodation-booking' ) ? 'night' : $product->get_duration_unit();
// Support time
if ( in_array( $unit, array( 'minute', 'hour' ) ) ) {
if ( ! empty( $start_date[1] ) ) {
$args['wc_bookings_field_start_date_time'] = $start_date[1];
}
}
if ( 'exact' === $behavior ) {
$duration = $this->calculate_duration( $start_date_raw, $end_date_raw, $product->get_duration(), $unit );
$args['wc_bookings_field_duration'] = $duration;
}
$booking_form = new WC_Booking_Form( $product );
$posted_data = $booking_form->get_posted_data( $args );
// All slots are available (exact match)
if ( true === $booking_form->is_bookable( $posted_data ) ) {
$matches[] = $post_id;
}
// Any slot between the given dates are available
elseif ( 'exact' !== $behavior ) {
$from = strtotime( $start_date_raw );
$to = strtotime( $end_date_raw );
$blocks_in_range = $booking_form->product->get_blocks_in_range( $from, $to );
// Arguments changed in WC Bookings 1.11.1
$available_blocks = $booking_form->product->get_available_blocks( array(
'blocks' => $blocks_in_range,
'from' => $from,
'to' => $to
) );
foreach ( $available_blocks as $check ) {
if ( true === $booking_form->product->check_availability_rules_against_date( $check, '' )){
$matches[] = $post_id;
break; // check passed
}
}
}
}
}
}
return $matches;
}