作者:刘妤劭明馨 | 来源:互联网 | 2018-05-21 20:38
<?phpfunctiona($args){echo$args;}functionb($args){return$args;}a(b(6666));输出6666************************functionc($callback){echo$callback(3);}functiond($args){return...
php的回调函数问题 <?phpfunctiona($args){echo$args;}functionb($args){return$args;}a(b(6666));输出6666************************functionc($callback){echo$callback(3);}functiond($args){return...