[edit] Last updated: Fri, 04 Oct 2013

The CachingIterator class

(PHP 5)

Introduction

This object supports cached iteration over another iterator.

Class synopsis

CachingIterator extends IteratorIterator implements OuterIterator , ArrayAccess , Countable {

/* Constants */

const integer CALL_TOSTRING = 1 ;

const integer CATCH_GET_CHILD = 16 ;

const integer TOSTRING_USE_KEY = 2 ;

const integer TOSTRING_USE_CURRENT = 4 ;

const integer TOSTRING_USE_INNER = 8 ;

const integer FULL_CACHE = 256 ;

/* Methods */

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

public int count ( void )

public void current ( void )

public void getCache ( void )

public void getFlags ( void )

public Iterator getInnerIterator ( void )

public void hasNext ( void )

public scalar key ( void )

public void next ( void )

public void offsetExists ( string $index )

public void offsetGet ( string $index )

public void offsetSet ( string $index , string $newval )

public void offsetUnset ( string $index )

public void rewind ( void )

public void setFlags ( bitmask $flags )

public void __toString ( void )

public void valid ( void )

}

Predefined Constants

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.

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 — The getCache purpose
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

add a note User Contributed Notes CachingIterator - [1 notes]

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-1

seyferseed at mail dot ru ¶

2 months ago


With this helpful iterator you can use hasNext() method, becouse inline iterator cached



<?php

$names = array("Jessey", "Joe","Jane");

$inames = new ArrayIterator($names);



$ci = new CachingIterator($inames);



foreach ($ci as $item)

{



  echo $item;



  if ($item->hasNext())

    echo " , ";



}



//output

//Jessey, Joe, Jane

?>

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The CachingIterator class

Introduction

Class synopsis

Predefined Constants

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