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SplFixedArray::__construct

(PHP 5 >= 5.3.0)

SplFixedArray::__constructConstructs 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"
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