php 检查数组为空

Given an array and we have to check if array is an empty or not using PHP.

给定一个数组，我们必须检查数组是否为空或不使用PHP。

To check whether an array is empty or not, we can use a built-in function empty(), in other cases where we want to check if a given variable is empty or not, it can also be used. It returns a Boolean response based on the condition that if the given variable contains a non-empty, non-zero value then it returns "false" otherwise, it returns "true".

要检查数组是否为空 ，我们可以使用内置函数empty() ，在其他情况下，如果要检查给定变量是否为空，也可以使用它。 它基于以下条件返回布尔响应：如果给定变量包含非空，非零值，则返回“ false”，否则返回“ true”。

Syntax:

句法：

    empty ($var);
empty ($array);

PHP code:

PHP代码：

<?php
// array declaration
$array1 = array('hello', 'world');
$array2 = array();
//checking whether arrays are empty or not
if (empty($array1)) {
echo "array1 is empty\n";
} else {
echo "array1 is not empty\n";
}
if (empty($array2)) {
echo "array2 is empty\n";
} else {
echo "array2 is not empty\n";
}
?>

Output

输出量

array1 is not empty
array2 is empty

翻译自: https://www.includehelp.com/php/check-if-an-array-is-empty-or-not-in-php.aspx

php 检查数组为空