php如何獲取一維陣列的長度，使用php函式count()，或是sizeof()；

示例如下：

$arr = Array("0","1","2","3","4");

echo count($arr);

// 輸出 5

$arr = array("A","B","C");

echo sizeof($arr);

//輸出3

多維陣列：

$arr=array(

0=>array("title" => "新聞1", "viewnum" => 123, "content" => "內容1"),

1=>array("title" => "新聞2", "viewnum" => 99, "content" => "內容2")

);

echo "不統計多維陣列：".count($arr,0); echo "或用sizeof為".sizeof($arr,0);

echo "";

echo "統計多維陣列：".count($arr,1);echo "或用sizeof為".sizeof($arr,1);