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Just wondering why something like this doesn't work:
public function address($name){
if(!isset($this->addresses[$name])){
$address = new stdClass();
$address->city = function($class = '', $style = ''){
return $class;
};
$this->addresses[$name] = $address;
}
return $this->addresses[$name];
}
Calling it like echo $class->address('name')->city('Class') should just echo Class, however I get Fatal error: Call to undefined method stdClass::city()
I can find a better way to do this, because this will get messy, but I'm wondering what I might be doing wrong there, or if PHP doesn't support this and why.
278
Anonymous Function is a function that does not have any name associated with it. Normally we use the function keyword before the function name to define a function in JavaScript, however, in anonymous functions in JavaScript, we use only the function keyword without the function name.
Anonymous function is a function without any user defined name. Such a function is also called closure or lambda function. Sometimes, you may want a function for one time use. Closure is an anonymous function which closes over the environment in which it is defined.
An anonymous function is a function that was declared without any named identifier to refer to it. As such, an anonymous function is usually not accessible after its initial creation. Normal function definition: function hello() { alert('Hello world'); } hello();
Yes, use a closure: functionName($someArgument, function() use(&$variable) { $variable = "something"; }); Note that in order for you to be able to modify $variable and retrieve the modified value outside of the scope of the anonymous function, it must be referenced in the closure using & . It's new!
PHP is right when invoke fatal error Call to undefined method stdClass::city() because object $class->address('name') has no method city.
Intead, this object has property city which is instance of Closure Class (http://www.php.net/manual/en/class.closure.php)
You can verify this: var_dump($class->address('name')->city)
I found the way to call this anonymous function is:
$closure = $class->address('name')->city;
$closure('class');
Hope this helps!
188
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