wp_helpers.php

<?php
/**
 * Compiles html attributes for the entity.
 *
 * Example:
 *  $attributes = [
 *      'id' => 'content',
 *      'data-number' => 23,
 *      'class' => [ 'container', 'maina-page' ],
 *      'style' => [
 *		    'settings' => [
 *              'glue' => ';',
 *          ],
 *          'color:' => '#fff'
 *      ]
 *      //...
 *  ];
 *
 *  The result is following: id="content" data-number="23" class="container main-page" style="color:#fff;" //...
 *
 * @param array $attributes
 *
 * @use esc_attr @see https://developer.wordpress.org/reference/functions/esc_attr/
 *
 * @since v1.1
 *
 * @author rumur
 *
 * @return string
 */
function compile_attributes( array $attributes ) {
	$compiled_attributes = '';

	foreach ( $attributes as $key => $a ) {

		if ( is_array( $a ) ) {
			$glue = " ";

			// Get settings for the current iteration.
			if ( array_key_exists( 'settings', $a ) ) {
				extract( $a['settings'] );
				unset( $a['settings'] );
			}

			/**
			 * Walk trough the array of the attributes
			 * and make them as a single string.
			 */
			$a = array_reduce( array_keys( $a ), function ( $carry, $name ) use ( $a, $glue ) {
				$attribute_value = $a[ $name ];
				$attribute_key = ! is_numeric( $name ) ? $name : '';

				return $carry . $attribute_key . $attribute_value . $glue;
			} );
		}

		if ( $a != '' ) {
			$compiled_attributes .= sprintf( '%s="%s" ', $key, esc_attr( $a ) );
		}
	}

	return $compiled_attributes;
}