在PHP中is_array的用法实例

在PHP中，is_array()函数用于检查给定的值是否是一个数组

示例1：检查字符串是否为数组

$str = "Hello, World!";
if (is_array($str)) {
    echo "The given value is an array.";
} else {
    echo "The given value is not an array.";
}
// 输出：The given value is not an array.

示例2：检查整数是否为数组

$num = 42;
if (is_array($num)) {
    echo "The given value is an array.";
} else {
    echo "The given value is not an array.";
}
// 输出：The given value is not an array.

示例3：检查多维数组是否为数组

$multi_dim_array = array(
    "name" => "John",
    "age" => 30,
    "city" => "New York"
);

if (is_array($multi_dim_array)) {
    echo "The given value is an array.";
} else {
    echo "The given value is not an array.";
}
// 输出：The given value is an array.

示例4：检查对象是否为数组

class Person {
    public $name;
    public $age;
}

$person = new Person();
$person->name = "John";
$person->age = 30;

if (is_array($person)) {
    echo "The given value is an array.";
} else {
    echo "The given value is not an array.";
}
// 输出：The given value is not an array.