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ReflectionGenerator::__construct is a constructor method in PHP's ReflectionGenerator class. It is used to create a new instance of the ReflectionGenerator class.

The ReflectionGenerator class is used for obtaining information about generator functions, which are special functions that can be paused and resumed. The ReflectionGenerator::__construct method takes in two optional parameters: a Generator object and a string containing the path to the source file where the generator function is defined.

If a Generator object is provided as the first parameter, then the ReflectionGenerator::__construct method will analyze the generator function associated with that object. If no Generator object is provided, but a string containing the path to the source file is given, then the ReflectionGenerator::__construct method will analyze the generator function defined in that source file.

Here is an example of how to use the ReflectionGenerator::__construct method:

php
function myGenerator() {
yield "Hello";
yield "World";
}

$generator = myGenerator();
$reflection = new ReflectionGenerator($generator);

var_dump($reflection);


In the above example, the myGenerator function is a generator function. We create a new instance of the ReflectionGenerator class by passing in the $generator object as the parameter to the constructor. The $reflection variable will then hold an instance of the ReflectionGenerator class, which can be used to obtain information about the myGenerator function.

Please note that the ReflectionGenerator::__construct method is only available in PHP 7 and later versions.