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  • SplFixedArray::__construct()

    (PHP 5 >= 5.3.0, PHP 7)

    Constructs a new fixed array

    说明

    publicSplFixedArray::__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 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"