SplFixedArray::__construct
(PHP 5 >= 5.3.0, PHP 7)
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 and
PHP_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
Example #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"