Php/docs/recursivefilteriterator.construct
RecursiveFilterIterator::__construct
(PHP 5 >= 5.1.0, PHP 7)
RecursiveFilterIterator::__construct — Create a RecursiveFilterIterator from a RecursiveIterator
说明
public RecursiveFilterIterator::__construct
( RecursiveIterator $iterator
)
Create a RecursiveFilterIterator from a RecursiveIterator.
返回值
没有返回值。
范例
Example #1 Basic RecursiveFilterIterator() example
<?phpclass TestsOnlyFilter extends RecursiveFilterIterator { public function accept() { // Accept the current item if we can recurse into it // or it is a value starting with "test" return $this->hasChildren() || (strpos($this->current(), "test") !== FALSE); }}$array = array("test1", array("taste2", "test3", "test4"), "test5");$iterator = new RecursiveArrayIterator($array);$filter = new TestsOnlyFilter($iterator);foreach(new RecursiveIteratorIterator($filter) as $key => $value){ echo $value . "\n";}?>
以上例程的输出类似于：
test1 test3 test4 test5
Example #2 RecursiveFilterIterator() example
<?phpclass StartsWithFilter extends RecursiveFilterIterator { protected $word; public function __construct(RecursiveIterator $rit, $word) { $this->word = $word; parent::__construct($rit); } public function accept() { return $this->hasChildren() OR strpos($this->current(), $this->word) === 0; } public function getChildren() { return new self($this->getInnerIterator()->getChildren(), $this->word); }}$array = array("test1", array("taste2", "test3", "test4"), "test5");$iterator = new RecursiveArrayIterator($array);$filter = new StartsWithFilter($iterator, "test");foreach(new RecursiveIteratorIterator($filter) as $key => $value){ echo $value . "\n";}?>
以上例程的输出类似于：
test1 test3 test4 test5
参见
- RecursiveFilterIterator::getChildren() - Return the inner iterator's children contained in a RecursiveFilterIterator
- RecursiveFilterIterator::hasChildren() - Check whether the inner iterator's current element has children
- FilterIterator::accept() - Check whether the current element of the iterator is acceptable
