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.

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