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is_object — Tests whether a value is an object.


bool is_object(value);
mixed value: Value or variable to test


TRUE if the value is an object; FALSE otherwise


is_object() checks whether value is an object. If so, the function returns TRUE. If not, FALSE is returned.


PHP Version: 3+, 4+

See also



Example 1396. Test whether a single value is an object

// Define a class to use in testing
class test {}

// Instantiate the class
$test = new test ();

is_object ($test)
    or die ('Variable $test is not a class');

Example 1397. Test whether a few different values are objects

// Define an empty class to use in testing
class test {}

$test = new test ();

// Make a list of values to test
$values = array (
    'new test ()' => new test (),
    'TRUE' => TRUE,
    "'Hello'" => 'Hello',
    'dir ()' => dir()   // Test a built-in class to see whether it returns an object

// Loop through the values and test whether they are objects
foreach ($values as $key => $value) {
    $is_object = is_object ($value) ? 'Yes' : 'No';

    printf ("<b>%'.-45s</b>%'.3s\n", $key, $is_object);

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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