TribeUtilsArray::array_visit_recursive( array $input, callable $visitor )

Recursively visits all elements of an array applying the specified callback to each element key and value.

Parameters
Source
Changelog

Parameters

$input: (array) (Required) The input array whose nodes should be visited.
$visitor: (callable) (Required) A callback function that will be called on each array item; the callback will receive the item key and value as input and should return an array that contains the update key and value in the shape [ <key>, <value> ]. Returning a null key will cause the element to be removed from the array.

Source

		public static function array_visit_recursive( $input, callable $visitor ) {
			if ( ! is_array( $input ) ) {
				return $input;
			}

			$return = [];

			foreach ( $input as $key => &$value ) {
				if ( is_array( $value ) ) {
					$value = static::array_visit_recursive( $value, $visitor );
				}
				// Ensure visitors can quickly return `null` to remove an element.
				list( $updated_key, $update_value ) = array_replace( [ $key, $value ], (array) $visitor( $key, $value ) );
				if ( false === $updated_key ) {
					// Visitor will be able to remove an element by returning a `false` key for it.
					continue;
				}
				if ( null === $updated_key ) {
					// Automatically assign the first available numeric index to the element.
					$return[] = $update_value;
				} else {
					$return[ $updated_key ] = $update_value;
				}
			}

			return $return;
		}

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