Initialization of php static variables_PHP tutorial

For example:
class A {
public $f1 = 'xxxx';
static public $f2 = 100;
}


If you want to assign the variable to an object, Then it can only be initialized in the constructor, for example:
class A {
private $child;
public function __construct() {
$this->child = new B();
}
}


But there is nothing similar to the static constructor/static block in java in php, so there is no appropriate time to initialize it.


There are other solutions for shared members, for example:
class A {
static public $child;
}
A::$child = new B( );


There seems to be no clean method for private members. The only way is:
class A {
static private $child;
static public initialize( ) {
self::$child = new B();
}
}
A::initialize();

http://www.bkjia.com/PHPjc/320844.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/320844.htmlTechArticleFor example: class A { public $f1 = 'xxxx'; static public $f2 = 100; } If you want to If the variable is assigned an object, it can only be initialized in the constructor, for example: class A { private $chi...