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RecursiveTreeIterator::endIteration is a method in PHP that is used to indicate the end of an iteration through a recursive tree structure, such as a directory tree.

When the iterator reaches the end of a subtree, it calls the endIteration method to notify the RecursiveTreeIterator object. This method can be overridden in a child class to perform any desired actions when the end of a subtree is reached.

For example, if you want to modify the behavior of the endIteration method, you can extend the RecursiveTreeIterator class and override the endIteration method with your custom logic. Here is an example:

php
class CustomTreeIterator extends RecursiveTreeIterator
{
public function endIteration()
{
// Perform custom actions at the end of a subtree iteration
echo "End of subtree reached\n";

// Call the parent method to preserve the original behavior
parent::endIteration();
}
}

// Example usage
$directory = new RecursiveDirectoryIterator('/path/to/directory');
$iterator = new RecursiveIteratorIterator($directory);
$treeIterator = new CustomTreeIterator($iterator);

foreach ($treeIterator as $item) {
echo $item . "\n";
}


In the above example, the CustomTreeIterator extends the RecursiveTreeIterator and overrides the endIteration method to echo a message when the end of a subtree is reached. The parent::endIteration() is called to preserve the original behavior of the method.

By using the CustomTreeIterator instead of the RecursiveTreeIterator, you can observe the custom behavior at the end of each subtree iteration.