SplFixedArray::__construct
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplFixedArray::__construct — Constructs a new fixed array
说明
public SplFixedArray::__construct(int
$size = 0)
Initializes a fixed array with a number of null values equal to size.
参数
-
size -
The size of the fixed array. This expects a number between
0andPHP_INT_MAX.
错误／异常
Throws a ValueError when size
is a negative integer.
更新日志
| 版本 | 说明 |
|---|---|
| 8.0.0 |
Now throws a ValueError if
size is a negative;
previously it threw a InvalidArgumentException.
|
范例
示例 #1 SplFixedArray::__construct() example
<?php
$array = new SplFixedArray(5);
$array[1] = 2;
$array[4] = "foo";
foreach($array as $v) {
var_dump($v);
}
?>
以上例程会输出：
NULL int(2) NULL NULL string(3) "foo"
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