如何计算PHP中数组中的所有元素？

为了计数数组中的所有元素，PHP提供了count()和sizeof()函数。两个函数count()和sizeof()都用于对数组中的所有元素进行计数，并为已用空数组初始化的变量返回0。这些是PHP的内置函数。我们可以使用count()或sizeof()函数来计算数组中存在的元素总数。

例如

我们将使用count()和sizeof()方法讨论所有数组元素的程序实现。

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;
?>

输出量

Number of elements present in the array: 4

例子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;
?>

输出量

Number of elements present in the array: 8

示例3：使用sizeof()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;
?>

输出量

Number of elements present in the array: 6

例子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;
?>

输出量

Number of elements present in the array: 7

示例5：使用2D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);
?>

输出量

8
8