2011年1月2日 · I have two classes, class ClassOne { } and class ClassTwo {}. I am getting a string which can be either "One" or "Two".

2015年6月11日 · The ::class is a special keyword, which is provided by PHP to get the fully qualified class name. See the official PHP documentation about ::class . <?php class Foo { const EXAMPLE_CONSTANT = 'bar'; } echo Foo::class; // print Foo …

2009年5月31日 · stdClass is NOT a base class! PHP classes do not automatically inherit from any class. All classes are standalone, unless they explicitly extend another class. PHP differs from many object-oriented languages in this respect. You could define a class that extends stdClass, but you would get no benefit, as stdClass does nothing.

2009年9月17日 · (object)[] is equivalent to new stdClass(). See the PHP manual : stdClass: Created by typecasting to object. and here: If an object is converted to an object, it is not modified. If a value of any other type is converted to an object, a new instance of …

As of PHP 7.0, with a little creativity and knowledge of some lesser known PHP features, you can absolutely do this without resorting to eval or creating script files dynamically.

2011年10月29日 · PHP, new variable class in namespace. Ask Question Asked 13 years, 3 months ago. Modified 5 years, 3 ...

2013年5月7日 · Real nested classes with public/protected/private accessibility were proposed in 2013 for PHP 5.6 as an RFC but did not make it (No voting yet, no update since 2013 - as of 2021/02/03):

2013年5月2日 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand

2010年10月6日 · While both ways are fine, I personally would prefer using new Car(); because usually, a method is being called here, and function/method calls in PHP require (). Also, it's more consistent with instantiations that have parameters. But in the end, it's down to taste.

by checking if there is an object stored on this static class variable, the class can then decide to create or not to create a single instance, so if its not set, !isset, meaning no object exists on the static member $_instance, then it generates a new object, stored it in the static member $_instance by the command. self::$_instance = new self();