SplFixedArray::offsetSet
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
?>
SplFixedArray::offsetUnset
(PHP 5 >= 5.3.0)
SplFixedArray::offsetUnset — Unsets the value at the specified $index
Opis
public void SplFixedArray::offsetUnset
( int
$index
)Unsets the value at the specified index.
Parametry
-
index -
The index being unset.
Zwracane wartości
Nie jest zwracana żadna wartość.
Błędy/Wyjątki
Throws RuntimeException when index is outside
the defined size of the array or when index cannot be parsed as an integer.
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User Contributed Notes
SplFixedArray::offsetUnset - [1 notes]
c dot 1 at smithies dot org ¶
2 years ago