is_array() 函数在 PHP 中用于检查一个变量是否是数组
如果给定的变量是数组,is_array() 函数将返回 true,否则返回 false。
示例:
$array = [1, 2, 3];$notArray = "This is not an array.";if (is_array($array)) { echo "The variable \$array is an array."; // 输出:The variable $array is an array.} else { echo "The variable \$array is not an array.";}if (is_array($notArray)) { echo "The variable \$notArray is an array.";} else { echo "The variable \$notArray is not an array."; // 输出:The variable $notArray is not an array.} 

