SplFixedArray::setSize()

(PHP 5 >= 5.3.0, PHP 7)

Change the size of an array

说明

publicSplFixedArray::setSize(int $size) : bool

Change the size of an array to the new size of $size.If $size is less than the current array size, any values after the new size will be discarded.If $size is greater than the current array size, the array will be padded with NULL values.

参数

$size

The new array size. This should be a value between 0and PHP_INT_MAX.

返回值

成功时返回TRUE，或者在失败时返回FALSE。

错误／异常

Throws InvalidArgumentExceptionwhen $size is less than zero.

Raises E_WARNINGwhen $size cannot be used as a number.

范例

SplFixedArray::setSize() example

<?php
   $array = new SplFixedArray(5);
   echo $array->getSize()."\n";
   $array->setSize(10);
   echo $array->getSize()."\n";
?>

以上例程会输出：

5
10