gistfile1.txt

/**
 * Returns correct theme button classes based on args.
 *
 * @since 3.2.0
 */
function wpex_get_button_classes( $style = array(), $color = '', $size = '', $align = '' ) {

	$args = $style;

	if ( ! is_array( $args ) ) {
		$args = array(
			'style' => $style,
			'color' => $color,
			'size'  => $size,
			'align' => $align,
		);
	}

	$defaults = apply_filters( 'wpex_button_default_args', array(
		'style' => '',
		'color' => '',
		'size'  => '',
		'align' => '',
	) );

	foreach ( $defaults as $key => $value ) {
		if ( empty( $args[ $key ] ) ) {
			$args[ $key ] = $defaults[ $key ];
		}
	}

	extract( $args );

	$classes = array();

	// Style
	switch ( $style ) {
		case 'plain-text':
			$classes[] = 'theme-txt-link';
			break;
		default:
			if ( $style ) {
				$classes[] = 'theme-button';
				$classes[] = sanitize_html_class( $style );
			} else {
				$classes[] = 'theme-button';
			}
			break;
	}

	// Color
	if ( $color ) {
		$classes[] = sanitize_html_class( $color );
	}

	// Size
	if ( $size ) {
		$classes[] = sanitize_html_class( $size );
	}

	// Align
	if ( $align ) {
		$classes[] = 'align-' . sanitize_html_class( $align );
	}

	// Sanitize
	$classes = array_map( 'esc_attr', $classes );

	// Convert class array to string
	$class = implode( ' ', $classes );

	// Apply filters and return classes
	return apply_filters( 'wpex_get_theme_button_classes', $class, $style, $color, $size, $align );
}