count函數(shù)里加函數(shù)

PHP count()函數(shù) (PHP count() function)

"count() function" is used to get the total number of elements of an array.

“ count()函數(shù)”用于獲取數(shù)組元素的總數(shù)。

Syntax:

句法：

count(array, [count_mode])

Here,

這里，

• array is the name of an input array

  array是輸入數(shù)組的名稱

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

  count_mode是一個(gè)可選參數(shù)，默認(rèn)值為0，它有兩個(gè)值

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

  0 –不計(jì)算多維數(shù)組的所有元素

  1 – It counts all elements of a multidimensional array

  1 –計(jì)算多維數(shù)組的所有元素

Examples:

例子：

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

PHP code: Using single dimensional array

PHP代碼：使用一維數(shù)組

<?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"); ?>

Output

輸出量

arr1 has 5 elements arr2 has 5 elements

PHP code: Using multidimensional array

PHP代碼：使用多維數(shù)組

<?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"); ?>

Output

輸出量

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)

翻譯自: https://www.includehelp.com/php/count-function-with-example.aspx

count函數(shù)里加函數(shù)

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