Check if an object has a property in PHP

Posted on Sep 26, 2022

Learn how to check if an object has a certain property in PHP

Photo from Unsplash

You can check whether a PHP object has a property or not by using the property_exists() function.

The property_exists() function can be used to check whether a property exists in a class or an object. The syntax is as follows:

    object|string $object_or_class,
    string $property
): bool

You need to pass two things:

  1. The object or class as the first argument
  2. The property in string as the second argument

Here’s an example of calling the function:

class Car {
    public $type;
    private $color;

// 👇 check class property
var_dump(property_exists("Car", "type")); // true

// 👇 check object property
var_dump(property_exists(new Car(), "color")); // true

// 👇 instantiate the object first
$car = new Car();
var_dump(property_exists($car, "wheels")); // false

When checking the property of a class, you pass the class name as a string. When checking an object, you need to pass the object instance.

By passing the property name as a string as shown above, the property_exists() function will check whether the property exists in the given class name or object.

Now you’ve learned how to check if an object has a certain property in PHP. Great!

Level up your programming skills

I'm sending out an occasional email with the latest programming tutorials. Drop your email in the box below and I'll send new stuff straight into your inbox!

No spam. Unsubscribe anytime.