sizeof函数

PHP sizeof()函数 (PHP sizeof() function)

sizeof() function is an alias of , it is used to get the total number of elements of an array.

sizeof()函数是的别名，用于获取数组元素的总数。

Syntax:

句法：

sizeof(array, [count_mode])

Here,

这里，

• array is the name of an input array

  array是输入数组的名称

• count_mode is an optional parameter and it's default value is 0, it has two values

  count_mode是一个可选参数，默认值为0，它有两个值

  0 – It does not count all elements of a multidimensional array

  0 –不计算多维数组的所有元素

  1 – It counts all elements of a multidimensional array

  1 –计算多维数组的所有元素

Examples:

例子：

Input:    $arr1 = array("101", "102", "103", "104", "105");    Output:    arr1 has 5 elements

PHP code: Using single dimensional array

PHP代码：使用一维数组

Output

输出量

arr1 has 5 elementsarr2 has 5 elements

PHP code: Using multidimensional array

PHP代码：使用多维数组

     array(                "name" => "Amit",                "age" => 21,            ),        "102" => array(                "name" => "Abhi",                "age" => 20,            )        );    $len = sizeof($students);    print ("sizeof value = $len (sizeof_mode is not provided)\n");    $len = sizeof($students, 0);    print ("sizeof value = $len (sizeof_mode is set to 0)\n");            $len = sizeof($students, 1);    print ("sizeof value = $len (sizeof_mode is set to 1)\n");    ?>

Output

输出量

sizeof value = 2 (sizeof_mode is not provided)sizeof value = 2 (sizeof_mode is set to 0)sizeof value = 6 (sizeof_mode is set to 1)

翻译自:

sizeof函数