"options"=>array是什么意义

"options"=>array是什么 意思
代码如下

$var=300;

$int_options = array(
"options"=>array
 (
 "min_range"=>0,
 "max_range"=>256
 )
);

if(!filter_var($var, FILTER_VALIDATE_INT, $int_options))
 {
 echo("Integer is not valid");
 }
else
 {
 echo("Integer is valid");
 }
?>

------解决方案--------------------

$int_options = array(
	"options"=>array
	(
		"min_range"=>0,
		"max_range"=>256
		)
	);

php数组的定义
=> 是数组成员访问符号 键名为options，值为array("min_range"=>0,"max_range"=>256) ...