PHP count()函数与示例

2024-04-20 03:12:04 316

PHPcount()方法

“count()函数”用于获取数组元素的总数。

语法：

count(array, [count_mode])

这里，

array是输入数组的名称

count_mode是一个可选参数，默认值为0，它具有两个值
0–不对多维数组的
所有元素进行计数1–对多维数组的所有元素进行计数

例子：

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

    Output:
    arr1 has 5 elements

PHP代码：使用一维数组

<?php    
    $arr1 = array("101", "102", "103", "104", "105");
    $arr2 = array("Amit", "Abhishek", "Prerana", "Aleesha", "Prem");
	
	$len = count($arr1);
	print ("arr1 has $len elements\n");
	$len = count($arr2);
	print ("arr2 has $len elements\n");	
?>

输出结果

arr1 has 5 elements
arr2 has 5 elements

PHP代码：使用多维数组

<?php    
    $students = array(
        "101" => array(
                "name" => "Amit",
                "age" => 21,
            ),
        "102" => array(
                "name" => "Abhi",
                "age" => 20,
            )
        );

    $len = count($students);
    print ("count value = $len (count_mode is not provided)\n");

    $len = count($students, 0);
    print ("count value = $len (count_mode is set to 0)\n");    
    
    $len = count($students, 1);
    print ("count value = $len (count_mode is set to 1)\n");    
?>

输出结果

count value = 2 (count_mode is not provided)
count value = 2 (count_mode is set to 0)
count value = 6 (count_mode is set to 1)

PHP count()函数与示例

PHP`count()`方法

随机推荐

PHP count()函数与示例

PHPcount()方法

热门推荐

随机推荐

PHP`count()`方法