is_object

(PHP 4, PHP 5, PHP 7, PHP 8)

is_object — Finds whether a variable is an object

Опис

is_object(mixed $value): bool

Finds whether the given variable is an object.

Параметри

value: The variable being evaluated.

Значення, що повертаються

Returns true if value is an object, false otherwise.

Журнал змін

Версія	Опис
7.2.0	is_object() now returns `true` for unserialized objects without a class definition (class of __PHP_Incomplete_Class). Previously `false` was returned.

Приклади

Приклад #1 is_object() example

<?php
// Declare a simple function to return an 
// array from our object
function get_students($obj)
{
    if (!is_object($obj)) {
        return false;
    }

    return $obj->students;
}

// Declare a new class instance and fill up 
// some values
$obj = new stdClass();
$obj->students = array('Kalle', 'Ross', 'Felipe');

var_dump(get_students(null));
var_dump(get_students($obj));
?>

Прогляньте також

is_bool() - Finds out whether a variable is a boolean
is_int() - Find whether the type of a variable is integer
is_float() - Finds whether the type of a variable is float
is_string() - Перевіряє, чи має задана змінна рядковий тип даних
is_array() - Finds whether a variable is an array

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User Contributed Notes 3 notes

down

peter dot nagel at portavita dot nl ¶

13 years ago

Note: is_object(null) returns false

This should actually be part of the input/output specification at the top of this page.

down

mark at not4you dot com ¶

13 years ago

Unserializes data as returned by the standard PHP serialize() function. If the unserialized object is not an array, it will be converted to one, particularily useful if it returns a __PHP_Incomplete_Class.



<?php

/**

 * 

 * @param string $data Serialized data

 * 

 * @return array    Unserialized array

 */

function unserialize2array($data) {

    $obj = unserialize($data);

    if(is_array($obj)) return $obj;

    $arr = array();

    foreach($obj as $k=>$v) {

        $arr[$k] = $v;

    }

    unset($arr['__PHP_Incomplete_Class_Name']);

    return $arr;

}

?>

down

monique at nijboer dot it ¶

3 months ago

I would expect a reference to is_a() function here.
if you would test if an object is of an specific type use is_a()
https://www.php.net/manual/en/function.is-a.php

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