PHP Standard library Arrayobject

The following are common functions for arrayobject:

Arrayiterator::current (void)//returns the current array element

Arrayiterator::key (void)//Returns the current array key

Arrayiterator::next (void)//refers to the down-number-group element

Arrayiterator::rewind (void)//reset array pointer to head

Arrayiterator::seek ()//Find a location in an array

Arrayiterator::valid ()//check if the array also contains other elements

Arrayobject::append ()//Add new element

Arrayobject::__construct ()//construct a new Array object

Arrayobject::count ()//Returns the number of elements in the iterator

Arrayobject::getiterator ()//construct a new iterator from an array object

Arrayobject::offsetexists (mixed index)//determine if the submitted value exists

Arrayobject::offsetget ()//Specify name to get the value

Arrayobject::offsetset ()//Modify the value of the specified name

Arrayobject::offsetunset ()//delete data

Example 1: Print all elements of an array

<?php
$array = Array (' 1 ' = ' one ',
' 2 ' = ' both ',
' 3 ' = ' three ');

$arrayobject = new Arrayobject ($array); Constructs a Arrayobject object

for ($iterator = $arrayobject->getiterator ();//Constructs an iterator
$iterator->valid ();//Check if the element is still included
$iterator->next ()) {//points to the next element

echo $iterator->key (). ' = '. $iterator->current (). "\ n";//print array elements
}
?>
Example 2: Resetting an array pointer

<?php
$arrayobject = new Arrayobject ();

$arrayobject [] = ' zero ';
$arrayobject [] = ' one ';
$arrayobject [] = ' both ';

$iterator = $arrayobject->getiterator ();

$iterator->next ();
echo $iterator->key (); 1

$iterator->rewind (); Reset the pointer to the head
echo $iterator->key (); 0
?>

PHP Standard library Arrayobject