The property_exists Function

The property_exists function checks if the specified property exists in the given object or class. The first parameter accepts an object or a class name, and the second one - the name of the property to check. The function returns true if the property exists, and false otherwise.

Syntax

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

Example

Let's check for the existence of a property in an object:

php<?php
  class MyClass {
    public $prop1 = 'value';
  }
  
  $obj = new MyClass();
  $res = property_exists($obj, 'prop1');
  var_dump($res);
?>

Code execution result:

phptrue

Example

Let's check for the existence of a non-existent property:

php<?php
  class MyClass {
    public $prop1 = 'value';
  }
  
  $obj = new MyClass();
  $res = property_exists($obj, 'prop2');
  var_dump($res);
?>

Code execution result:

phpfalse

Example

Let's check for the existence of a property in a class (without creating an object):

php<?php
  class MyClass {
    public $prop1 = 'value';
  }
  
  $res = property_exists('MyClass', 'prop1');
  var_dump($res);
?>

Code execution result:

phptrue

Example

Let's check for the existence of a protected property:

php<?php
  class MyClass {
    protected $prop1 = 'value';
  }
  
  $obj = new MyClass();
  $res = property_exists($obj, 'prop1');
  var_dump($res);
?>

Code execution result:

phptrue

See Also