Output various times

output_times.php

<?php
add_action('wp_footer', 'test_func');
function test_func() {
	error_log("WORDPRESS OUTPUT_______");
	error_log( "get_option('gmt_offset') returns: " . get_option('gmt_offset') );
	error_log( "get_option('timezone_string') returns: " . get_option('timezone_string') );
	$blogtime = current_time( 'mysql' );
	list( $today_year, $today_month, $today_day, $hour, $minute, $second ) = preg_split( '([^0-9])', $blogtime );
	error_log( "current_time( 'mysql' ) returns local site time: " . current_time( 'mysql' ) );
	error_log( "current_time( 'mysql', 1 ) returns GMT: " . current_time( 'mysql', 1 ) );
	error_log( "current_time( 'timestamp' ) returns local site time: " . date( 'Y-m-d H:i:s', current_time( 'timestamp', 0 ) ) );
	error_log( "current_time( 'timestamp', 1 ) returns GMT: " . date( 'Y-m-d H:i:s', current_time( 'timestamp', 1 ) ) );
	error_log( "SERVER OUTPUT_______");
	if (date_default_timezone_get()) {
    		error_log( "date_default_timezone_set: " . date_default_timezone_get() );
	}
	if (ini_get('date.timezone')) {
		error_log( "date.timezone: " . ini_get('date.timezone') );
	}
	error_log( "gmdate('Y-m-d H:i:s') returns GMT: " . gmdate("Y-m-d H:i:s") );
	error_log( "date('Y-m-d H:i:s') returns local server time: " . date("Y-m-d H:i:s") );
}