PHP 如何统计数组中的所有元素

要统计数组中的所有元素，PHP提供了count()和sizeof()函数。count()和sizeof()函数都用于统计数组中的所有元素，并对已初始化为空数组的变量返回0。这些是PHP的内置函数。我们可以使用count()或sizeof()函数来统计数组中的总元素数。

例如：

我们将讨论使用count()和sizeof()方法来实现对数组所有元素的计数。

示例1 ：使用count()进行计数

<?php
    ele = array("Ryan", "Ahana", "Ritvik", "Amaya");no_of_ele = count(ele);
    echo "Number of elements present in the array: ".no_of_ele;
?>

输出

Number of elements present in the array: 4

示例2

<?php
    ele = array(14, 89, 26, 90, 36, 48, 67, 75);no_of_ele = sizeof(ele);
    echo " Number of elements present in the array: ".no_of_ele;
?>

输出

Number of elements present in the array: 8

示例3 ：使用sizeof()函数进行计数

<?php
    ele = array("Jan", "Feb", "Mar", "Apr", "May", "Jun");no_of_ele = sizeof(ele);
    echo " Number of elements present in the array: ".no_of_ele;
?>

输出

Number of elements present in the array: 6

示例4

<?php
    ele = array(14, 89, 26, 90, 36, 48, 67);no_of_ele = sizeof(ele);
    echo " Number of elements present in the array: ".no_of_ele;
?>

输出

Number of elements present in the array: 7

示例5 ：使用二维数组的示例

<?php
    snacks = array('drinks' => array('cold coffee', 'traffic jam', 'Espresso',
    'Americano'), 'bevrage' => array('spring rolls', 'nuddles'));
    echo count(snacks, 1);
    echo "</br>";
    echo sizeof($snacks, 1);    
?>

输出

8
8