AppendIterator::valid
If you want to make your ArrayIterator support foreach loops with PHP's & operator, such as
<?php
foreach($list as &$item) {
....
}
?>
You will need to pass the array to ArrayIterator by reference:
<?php
new ArrayIterator(&$array);
?>
The ArrayIterator class
Introduction
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.
Class synopsis
/* Methods */
__construct
( mixed $array
)
}Table of Contents
- 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 NotesArrayIterator
liranuna at liranuna dot com
03-Dec-2009 03:44
03-Dec-2009 03:44
Sean Burlington
26-May-2009 02:15
26-May-2009 02:15
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 12:44
11-Nov-2008 12:44
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.