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.