ArrayIterator::offsetUnset

(PHP 5 >= 5.0.0)

ArrayIterator::offsetUnsetUnset value for an offset

Description

public void ArrayIterator::offsetUnset ( string $index )

Unsets a value for an offset.

Warning

This function is currently not documented; only its argument list is available.

Parameters

index

The offset to unset.

Return Values

No value is returned.

See Also

Коментарии

Make sure you use this function to unset a value. You can't access this iterator's values as an array. Ex:

<?php
$iterator 
= new \RecursiveIteratorIterator(new \RecursiveArrayIterator($arr));

foreach(
$iterator as $key => $value)
{
    unset(
$iterator[$key]); 
}
?>

Will return :

PHP Fatal error:  Cannot use object of type RecursiveIteratorIterator as array

offsetUnset works properly even when removing items from nested arrays.
2011-06-24 02:23:30
http://php5.kiev.ua/manual/ru/arrayiterator.offsetunset.html
Автор:
When unsetting elements as you go it will not remove the second index of the Array being worked on. Im not sure exactly why but there is some speculations that when calling unsetOffset(); it resets the pointer aswell.

<?php

$a 
= new ArrayObjectrange0,) );
$b = new ArrayIterator$a );

for ( 
$b->rewind(); $b->valid(); $b->next() )
{
    echo 
"#{$b->key()} - {$b->current()} - \r\n";
   
$b->offsetUnset$b->key() );
}

?>

To avoid this bug you can call offsetUnset in the for loop

<?php
/*** ... ***/
for ( $b->rewind(); $b->valid(); $b->offsetUnset$b->key() ) )
{
/*** ... ***/
?>

Or unset it directly in the ArrayObject
<?php
/*** ... ***/
   
$a->offsetUnset$b->key() );
/*** ... ***/
?>

which will produce correct results
2011-07-07 07:12:30
http://php5.kiev.ua/manual/ru/arrayiterator.offsetunset.html
Автор:
This is my solution for problem with offsetUnset
<?php

$a 
= new ArrayObjectrange0,) );
$b = new ArrayIterator$a );

for ( 
$b->rewind(); $b->valid();  )
{
    echo 
"#{$b->key()} - {$b->current()} - <br>\r\n";
    if(
$b->key()==|| $b->key()==1){
       
$b->offsetUnset$b->key() );
    }else {
       
$b->next();
    }
}

var_dump($b);
?>
2014-02-14 11:11:59
http://php5.kiev.ua/manual/ru/arrayiterator.offsetunset.html

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