Php/docs/class.cachingiterator

• PHP Manual
• 迭代器
• The CachingIterator class

(PHP 5, PHP 7)

简介

This object supports cached iteration over another iterator.

类摘要

CachingIterator extends IteratorIterator implements OuterIterator , ArrayAccess , Countable {

/* 常量 */

const int CALL_TOSTRING = 1

const int CATCH_GET_CHILD = 16

const int TOSTRING_USE_KEY = 2

const int TOSTRING_USE_CURRENT = 4

const int TOSTRING_USE_INNER = 8

const int FULL_CACHE = 256

/* 方法 */

public __construct ( Iterator $iterator [, int $flags = self::CALL_TOSTRING ] )

public count ( ) : int

public current ( ) : mixed

public getCache ( ) : array

public getFlags ( ) : int

public getInnerIterator ( ) : Iterator

public hasNext ( ) : void

public key ( ) : scalar

public next ( ) : void

public offsetExists ( mixed $index ) : void

public offsetGet ( string $index ) : void

public offsetSet ( mixed $index , mixed $newval ) : void

public offsetUnset ( string $index ) : void

public rewind ( ) : void

public setFlags ( int $flags ) : void

public __toString ( ) : void

public valid ( ) : void

}

预定义常量

CachingIterator::CALL_TOSTRING

Convert every element to string.

CachingIterator::CATCH_GET_CHILD

Don't throw exception in accessing children.

CachingIterator::TOSTRING_USE_KEY

Use key for conversion to string.

CachingIterator::TOSTRING_USE_CURRENT

Use current for conversion to string.

CachingIterator::TOSTRING_USE_INNER

Use inner for conversion to string.

CachingIterator::FULL_CACHE

Cache all read data.

Table of Contents

• CachingIterator::__construct — Construct a new CachingIterator object for the iterator
• CachingIterator::count — The number of elements in the iterator
• CachingIterator::current — Return the current element
• CachingIterator::getCache — Retrieve the contents of the cache
• CachingIterator::getFlags — Get flags used
• CachingIterator::getInnerIterator — Returns the inner iterator
• CachingIterator::hasNext — Check whether the inner iterator has a valid next element
• CachingIterator::key — Return the key for the current element
• CachingIterator::next — Move the iterator forward
• CachingIterator::offsetExists — The offsetExists purpose
• CachingIterator::offsetGet — The offsetGet purpose
• CachingIterator::offsetSet — The offsetSet purpose
• CachingIterator::offsetUnset — The offsetUnset purpose
• CachingIterator::rewind — Rewind the iterator
• CachingIterator::setFlags — The setFlags purpose
• CachingIterator::__toString — Return the string representation of the current element
• CachingIterator::valid — Check whether the current element is valid