php 檢查數組為空

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

給定一個數組，我們必須檢查數組是否為空或不使用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".

要檢查數組是否為空 ，我們可以使用內置函數empty() ，在其他情況下，如果要檢查給定變量是否為空，也可以使用它。 它基于以下條件返回布爾響應：如果給定變量包含非空，非零值，則返回“ false”，否則返回“ true”。

Syntax:

句法：

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

PHP code:

PHP代碼：

<?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

輸出量

array1 is not empty
array2 is empty

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

php 檢查數組為空