SplFixedArray::__construct()

(PHP 5 >= 5.3.0, PHP 7)

Constructs a new fixed array

说明

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 0and PHP_INT_MAX.

返回值

没有返回值。

错误／异常

Throws InvalidArgumentExceptionwhen $size is a negative number.

Raises E_WARNINGwhen $size cannot be parsed as a number.

范例

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"