Fix PHP deprecation errors

[Utsav-Ladani]

Fix PHP deprecated notices

These PHP deprecated notices are resolved

FILTER_SANITIZE_STRING filter deprecated

• FILTER_SANITIZE_STRING is deprecated in the latest PHP versions.
• According to PHP docs, It is solved by replacing FILTER_SANITIZE_STRING to FILTER_SANITIZE_FULL_SPECIAL_CHARS.

Dynamic property creation is not allowed

• This error occurs if we use a class data member without declaring it in class.

   class Some_Class {
   	public function __constructure () {
   		// In the below line, we get an error in the latest version of PHP because we didn't declare the data member `$some_var` in class.
   	$this->some_var = 123;
   	}
  
   /**
    * It can be fixed by declaring data members in the class.
    */
   class Some_Class {
   	public $some_var;
  
   	public function __constructure ()
   		$this->some_var = 123;
   	}
   }

• It is produced by the RTMediaUserInteraction class, where strings are passed as args and are used to create class properties dynamically.
• It is solved by adding those properties to the RTMediaUserInteraction class.

Note

• These changes are support for 7.0 and later versions of PHP.

Related Issue

• Fix deprecated notices with different PHP version #1987