ps网站交互设计,抖音营销软件,义乌网站制作电话,seo外链查询工具本节内容#xff1a;php多构造器的类在php编程中#xff0c;实例化一个类时#xff0c;需要根据构造方法的参数个数进行初始化不用的内容#xff0c;类似php函数或方法的可选参数。来看例子#xff1a;复制代码 代码示例:/*** php 多构造器的类* by www.jbxue.com*/class …本节内容php多构造器的类在php编程中实例化一个类时需要根据构造方法的参数个数进行初始化不用的内容类似php函数或方法的可选参数。来看例子复制代码 代码示例:/*** php 多构造器的类* by www.jbxue.com*/class A {public function __construct() {$a func_get_args();$i func_num_args();if (method_exists($this,$f__construct.$i)) {call_user_func_array(array($this,$f),$a);}}public function __construct1($a1) {echo __construct with 1 param called: .$a1.PHP_EOL;}public function __construct2($a1,$a2) {echo __construct with 2 params called: .$a1.,.$a2.PHP_EOL;}public function __construct3($a1,$a2,$a3) {echo __construct with 3 params called: .$a1.,.$a2.,.$a3.PHP_EOL;}}$o new A(sheep);$o new A(sheep,cat);$o new A(sheep,cat,dog);// 结果:// __construct with 1 param called: sheep// __construct with 2 params called: sheep,cat// __construct with 3 params called: sheep,cat,dog?
