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. }