PHP check whether property exists in object or class

Question

I understand PHP does not have a pure object variable, but I want to check whether a property is in the given object or class.

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Answer 1

To check if something exits, you can use the PHP function isset() see php.net. This function will check if the variable is set and is not NULL.

Example:

if(isset($obj->a))
{ 
  //do something
}

If you need to check if a property exists in a class, then you can use the build in function property_exists()

Example:

if (property_exists('class', $property)) {
    //do something
}