Filter for Starting and Ending Hours

I created a filter gravityforms_only_start_end_time’ – If true will filter hours to only hours set in

gravityforms_business_hours_default_start_time – Default start time in H:i format (default: 09:00)
gravityforms_business_hours_default_end_time – Default end time in H:i format (default: 18:00)

Or default hours if not set.

I made changes to the function gf_business_hours_get_times(), located in helper-functions.php

/**
 * Generate array of times with key in <code>H:i</code> format and after-midnight in <code>+H:i</code> format
 *
 * @since 2.0
 *
 * @param  boolean $with_after_midnight Include times for next day
 *
 * @return array Array of times, with keys as <code>H:i</code>-formatted time, and values as <code>g:i a</code> formatted time
 
 * Added option of $only_start_end_time. - Ira Rabinowitz  [email protected]
 */
function gf_business_hours_get_times( $with_after_midnight = false) {

	$key_format = 'H:i';

	/**
	 * Modify the time format for the displayed value
	 * @param string
	 */
	$value_format = apply_filters( 'gravityforms_business_hours_time_format', 'g:i a' );
	
	$only_start_end_time = apply_filters( 'gravityforms_only_start_end_time', false); 

	/**
	 * Time interval for the time dropdown options
	 * @var int
	 */
	$interval_minutes = apply_filters( 'gravityforms_business_hours_interval', 30 );
	$interval_minutes = intval( $interval_minutes );
	$interval = new DateInterval('PT'.$interval_minutes.'M');
	
	if ($only_start_end_time) {
		$starttime = apply_filters('gravityforms_business_hours_default_start_time','00:00'); 
		$endtime = apply_filters('gravityforms_business_hours_default_end_time','00:00');
 		$endingtime = new DateTime( $endtime );
		$endingtime->add($interval);
		$tempendtime = $endingtime->format($key_format);
		$with_after_midnight = false;
	} else {
		$starttime = '00:00';
	}
	
	$time = new DateTime( $starttime );

	$temptime = '';

	$times = array();

	do {

		$key = $time->format( $key_format );

		// 12:30 am
		$value = $time->format( $value_format );

		$times[ $key ] = $value;

		// Increase by 30 minute intervals
		$time->add($interval);
		
		$temptime = $time->format( $key_format );

} while( $temptime !== ($only_start_end_time ? $tempendtime : $starttime ));

	// Build additional times for the next day closing times
	if( $with_after_midnight ) {

		$next_day = __('next day', 'gravity-forms-business-hours');

		foreach( $times as $key => $time ) {

			$times[ '+'.$key ] = sprintf( '%s (%s)', $time, $next_day );

			// Only show "Next day" times until 7am
			if( $key === '07:00' ) {
				break;
			}
		}

	}

	return $times;
}