Last updated: Fri, 20 Nov 2009

The ArrayIterator class

Introducere

This iterator allows to unset and modify values and keys while iterating over Arrays and Objects.

When you want to iterate over the same array multiple times you need to instantiate ArrayObject and let it create ArrayIterator instances that refer to it either by using foreach or by calling its getIterator() method manually.

Sinopsisul clasei

ArrayIterator

ArrayIterator implements Iterator , Traversable , ArrayAccess , SeekableIterator , Countable {

/* Methods */

public void append ( string $value )

public void asort ( void )

__construct ( mixed $array )

public void count ( void )

mixed current ( void )

public void getArrayCopy ( void )

public void getFlags ( void )

mixed key ( void )

public void ksort ( void )

public void natcasesort ( void )

public void natsort ( void )

void next ( void )

public void offsetExists ( string $index )

public mixed offsetGet ( string $index )

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

public void offsetUnset ( string $index )

void rewind ( void )

void seek ( int $position )

public string serialize ( void )

public void setFlags ( string $flags )

public void uasort ( string $cmp_function )

public void uksort ( string $cmp_function )

public string unserialize ( string $serialized )

bool valid ( void )

}

Cuprins

ArrayIterator::append — Append an element
ArrayIterator::asort — Sort array by values
ArrayIterator::__construct — Construct an ArrayIterator
ArrayIterator::count — Count elements
ArrayIterator::current — Return current array entry
ArrayIterator::getArrayCopy — Get array copy
ArrayIterator::getFlags — Get flags
ArrayIterator::key — Return current array key
ArrayIterator::ksort — Sort array by keys
ArrayIterator::natcasesort — Sort an array naturally, case insensitive
ArrayIterator::natsort — Sort an array naturally
ArrayIterator::next — Move to next entry
ArrayIterator::offsetExists — Check if offset exists
ArrayIterator::offsetGet — Get value for an offset
ArrayIterator::offsetSet — Set value for an offset
ArrayIterator::offsetUnset — Unset value for an offset
ArrayIterator::rewind — Rewind array back to the start
ArrayIterator::seek — Seek to position
ArrayIterator::serialize — Serialize
ArrayIterator::setFlags — Set behaviour flags
ArrayIterator::uasort — User defined sort
ArrayIterator::uksort — User defined sort
ArrayIterator::unserialize — Unserialize
ArrayIterator::valid — Check whether array contains more entries

add a note User Contributed Notes
ArrayIterator

Sean Burlington
26-May-2009 12:15


and to iterate recursively use the (sparsely documented)  RecursiveArrayIterator



<?php



$fruits = array(

                "apple" => "yummy",

                "orange" => "ah ya, nice",

                "grape" => "wow, I love it!",

                 "plum" => "nah, not me"

                );



$veg = array("potato" => "chips", "carrot" => "soup");

$grocery = array($fruits, $veg);

$obj = new ArrayObject( $grocery );



$it = new RecursiveIteratorIterator( new RecursiveArrayIterator($grocery));



foreach ($it as $key=>$val)

echo $key.":".$val."\n";



?>



Output

--------

apple:yummy

orange:ah ya, nice

grape:wow, I love it!

plum:nah, not me

potato:chips

carrot:soup

Venelin Vulkov
11-Nov-2008 11:44


Another fine Iterator from php . You can use it especially when you have to iterate over objects



<?php

$fruits = array(

    "apple" => "yummy",

    "orange" => "ah ya, nice",

    "grape" => "wow, I love it!",

    "plum" => "nah, not me"

);

$obj = new ArrayObject( $fruits );

$it = $obj->getIterator();



// How many items are we iterating over?



echo "Iterating over: " . $obj->count() . " values\n";



// Iterate over the values in the ArrayObject:

while( $it->valid() )

{

    echo $it->key() . "=" . $it->current() . "\n";

    $it->next();

}



// The good thing here is that it can be iterated with foreach loop



foreach ($it as $key=>$val)

echo $key.":".$val."\n";



/* Outputs something like */



Iterating over: 4 values

apple=yummy

orange=ah ya, nice

grape=wow, I love it!

plum=nah, not me



?>



Regards.

add a note

ArrayIterator::append

AppendIterator::valid

Last updated: Fri, 20 Nov 2009