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SplFixedArray::rewind> <SplFixedArray::offsetSet
[edit] Last updated: Fri, 25 May 2012

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SplFixedArray::offsetUnset

(PHP 5 >= 5.3.0)

SplFixedArray::offsetUnsetDétruit l'élément à un index donné

Description

public void SplFixedArray::offsetUnset ( int $index )

Détruit l'élément à l'index index.

Liste de paramètres

index

L'index de l'élément à détruire.

Valeurs de retour

Aucune valeur n'est retournée.

Erreurs / Exceptions

Lance une exception RuntimeException lorsque index est en dehors de la taille du tableau ou lorsque index n'a pu être analysé comme un entier.



add a note add a note User Contributed Notes SplFixedArray::offsetUnset
c dot 1 at smithies dot org 22-Nov-2010 08:07
This function assigns NULL to the array element. Its use has no effect on count(). Whereas assigning NULL to an element will have no effect on isset(), offsetUnset() and unset() do. Whereas unsetting an element affects the behaviour of foreach() as applied to an array or an ArrayObject, it has no such effect on SplFixedArray, as demonstrated by the code below.

<?php

class atest extends SplFixedArray {
  public function
fill() {
    for (
$i = $this->count(); --$i >= 0; ) $this[$i] = $i;
  }
  public function
dump() {
   
$sep = ' ';
    foreach (
$this as $k => $v) {
      echo
$sep, "$k: ", (is_null($v) ? 'NULL' : $v);
      if (!isset(
$this[$k])) echo ' and unset';
     
$sep = ', ';
    }
    echo
PHP_EOL;
  }
}

$a = new atest(3);
$a->dump(); //  0: NULL and unset, 1: NULL and unset, 2: NULL and unset
$a->fill();
$a->dump(); //  0: 0, 1: 1, 2: 2
$a[1] = NULL;
unset(
$a[2]);
$a->dump(); //  0: 0, 1: NULL, 2: NULL and unset
?>

 
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