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
0
andPHP_INT_MAX
.
返回值
没有返回值。
错误/异常
Throws InvalidArgumentException when size
is a negative
number.
Raises E_WARNING
when size
cannot be parsed as a number.
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"