What does the syntax $fun($this, $this->_context) mean in PHP?

The syntax $fun($this, $this->_context) in PHP is calling a function named $fun with two arguments: $this (referring to the current object instance) and $this->_context (referring to a property within the current object). This syntax is commonly used in object-oriented programming to pass the current object and its context to a function for processing. 

class MyClass {
    private $_context;

    public function myFunction($fun) {
        $result = $fun($this, $this->_context);
        return $result;
    }
}

Keywords

PHP syntax function $this _context

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