Traversable is used to detect whether a class can traverse using foreach, an internal engine interface that cannot be implemented in a PHP script, and we use the iterator interface or the Iteratoraggregate interface to implement traversal in real-world programming.
Interface Summary:
traversable {}
One of the important uses of traversable is to determine if a class can traverse, and here is the official example:
It is important to note that arrays and objects can be traversed through foreach, but they do not implement the Traversable interface, so this is not an example of traversable:
The above code output:
Boolean false
Boolean false
Additional notes:
Class does not implement the iterator interface or the Iteratoraggregate interface, executing a foreach traversal outputs all of the visible properties that it can access
The above describes the Php-traversable interface in detail, including the aspects of the content, I hope that the PHP tutorial interested in a friend helpful.
