PHP array recursive sequencing implementation steps

This time for everyone to bring the PHP array recursive ordering implementation steps in detail, the PHP array recursive sorting implementation of the considerations are what, the following is the actual case, take a look.

/** * Recursion is sorted by a specific key array * @param $data * @param string $orderKey * @param string $sonKey * @param int $orderBy * @return Mixe D */function Recursion_orderby ($data, $orderKey = ' order ', $sonKey = ' children ', $orderBy = sort_asc) {$func = function ( $value) Use ($sonKey, $orderKey, $orderBy) {if (Isset ($value [$sonKey]) && is_array ($value [$sonKey])) {$v    alue[$sonKey] = Recursion_orderby ($value [$sonKey], $orderKey, $sonKey, $orderBy);  } return $value;  }; Return Array_orderby (Array_map ($func, $data), $orderKey, $orderBy);}      $a = [[' Order ' = 0,], [' Order ' =-1, ' children ' = = [' Order ' = 0,], [' Order ' =-2, ' children ' = = [' Order ' = 0], [' Order ' =-1], [ ' Order ' = 1],],],], [' order ' = = 2,],];var_dump (Recursion_orderby ($a));/** * Output: Array (3 {[0] = = Array (2) {' order ' = = Int ( -1) ' Children ' = + Array (2) {[0] = =   Array (2) {' order ' = = Int ( -2) ' Children ' = + Array (3) {[0] = = Array (1) {' Order ' =&gt      ; int ( -1)} [1] = = Array (1) {' order ' = = Int (0)} [2] = = Array (1) {' Order ' = = Int (1)}}} [1] = = Array (1) {' order ' = = Int (0)}}} [1] = + Array (1) {' Order ' = = Int (0)} [2] = = Array (1) {' order ' = = Int (2)}}*/

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