AssocArrayArraysSort.php

<?php
/**
 * Sorting class for array of associative arrays.
 *
 * Allows sort array by children array field value.
 *
 * @license http://www.opensource.org/licenses/mit-license.html  MIT License
 *
 * @example
 * ```php
 * uasort($data, [
 *    new ArrayAssocSort($field),
 *    'compareAscending',
 * ]);
 * ```
 */
class AssocArrayArraysSort {
   /**
    * Field name of children array for that will be sorting.
    *
    * @var string
    */
   private $field;
   /**
    * ArrayAssocSort constructor.
    *
    * @param string $field
    *   Field name.
    */
   public function __construct($field) {
      $this->field = $field;
   }
   /**
    * Compares elements ASC.
    *
    * @param array $one
    *   The first element to compare.
    * @param array $two
    *   The second element to compare.
    *
    * @return int
    *   The compared result (-1|0|1).
    */
   public function compareAscending(array $one, array $two) {
      if (isset($one[$this->field]) && isset($two[$this->field])) {
         return strnatcmp($one[$this->field], $two[$this->field]);
      }
      return 0;
   }
   /**
    * Compares elements DESC.
    *
    * @param array $one
    *   The first element to compare.
    * @param array $two
    *   The second element to compare.
    *
    * @return int
    *   The compared result (-1|0|1).
    */
   public function compareDescending(array $one, array $two) {
      if (isset($one[$this->field]) && isset($two[$this->field])) {
         return strnatcmp($two[$this->field], $one[$this->field]);
      }
      return 0;
   }
}