Wordpress Inline Script with Fallback

functions.php

<?php
/**
 * see - https://digwp.com/2019/07/better-inline-script/
 * by - Jeff Starr
 */

// enqueue scripts
function shapeSpace_enqueue_scripts() {
	
	wp_enqueue_script('shapeSpace_script', get_template_directory_uri() .'/js/script.js', array(), '1.0', true);
	
	shapeSpace_inline_script();
	
}
add_action('wp_enqueue_scripts', 'shapeSpace_enqueue_scripts');


// inline scripts WP >= 4.5
function shapeSpace_inline_script() {
	
	$wp_version = get_bloginfo('version');
	
	if (version_compare($wp_version, '4.5', '>=')) {
		
		$script  = 'var1 = '. json_encode('var1') .'; ';
		$script .= 'var2 = '. json_encode('var2') .'; ';
		$script .= 'var3 = '. json_encode('var3') .'; ';
		
		wp_add_inline_script('shapeSpace_script', $script, 'before');
		
	}
	
}

// inline scripts WP < 4.5
function shapeSpace_print_scripts() { 
	
	$wp_version = get_bloginfo('version');
	
	if (version_compare($wp_version, '4.5', '<')) {
		
		?>
		
		<script>
			var var1 = <?php echo json_encode('var1'); ?>;
			var var2 = <?php echo json_encode('var2'); ?>;
			var var3 = <?php echo json_encode('var3'); ?>;
		</script>
		
		<?php
		
	}
	
}
add_action('wp_print_scripts', 'shapeSpace_print_scripts');