The operator = used in PHP has two different functions: 1. Add: $value = 3; $value += 5; //$value = 8 2. Setting default values in an array: $arr = array(‘foo’ => true); $arr += array(‘foo’ => false); //$arr = array(‘foo’ => true) As the key “foo” is already defined in the array, it does[…]
Anonymous functions in PHP may use this expression: function($parameter) use ($value) { } What does it means? This function, simply use a reference to the variable $value that then returns to the parent scope. For example: $value = 5; $customFunction = function($parameter) use ($value) { $value = $value + $parameter; } call_user_func ( $customFunction, 2[…]