How can we determine whether a PHP variable is an instantiated object of a certain class?

  • instanceof operator
  • is_object() function
  • is_instance() function
  • class_exists() function
To determine if a PHP variable is an instantiated object of a certain class, you can use the instanceof operator. It checks if an object is an instance of a specific class or has a class in its inheritance hierarchy. Learn more: http://php.net/manual/en/language.operators.type.php
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