PHP does not allow the passing of function pointers like other languages. Functions are not first class in PHP. Functions being first class mainly means that you can save a function to a variable, and pass it around and execute it at any time.<\/p>\n
The __invoke method is a way that PHP can accommodate pseudo-first-class functions.<\/p>\n
The __invoke method can be used to pass a class that can act as a closure or a continuation, or simply as a function that you can pass around.<\/p>\n
The __invoke() method is called when a script tries to call an object as a function.<\/p>\n
<?php\n class Invoke {\n public function __invoke($x)\n {\n var_dump($x);\n }\n }\n $obj = new Invoke;\n $obj(5);\n?><\/pre>\n","protected":false},"excerpt":{"rendered":"PHP does not allow the passing of function pointers like other languages. Functions are not first class in PHP. Functions being first class mainly means that you can save a function to a variable, and pass it around and execute it at any time. The __invoke method is a way that PHP can accommodate pseudo-first-class … Continue reading __invoke<\/span>