PHP Single-mode code

Class User { static function getinstance () { if (self:: $instance = = NULL) {//If instance is not created yet, would create it. Self:: $instance = new User (); } Return self:: $instance; } Private Function __construct () Constructor method as private so by mistake developer not crate Second object of the User class with the use of new operator { } Private Function __clone () Clone method as private so by mistake developer not crate Second object of the User class with the use of clone. { } function Log ($STR) { Echo $str; } static private $instance = NULL; } User::getinstance ()->log ("Welcome User"); Copy Code

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