public String join(String head, String body){ if(body == null) body = "Nobody"; return head + body;}
function join(head, body='Nobody'){ return head.body; }
区别:
1.php的函数不会在方法签名中指定返回类型
2.php的函数不会在方法签名中指定参数类型
3.php的函数可以给参数设定默认值
public String join(String head, String body){ if(body == null) body = "Nobody"; return head + body;}
function join(head, body='Nobody'){ return head.body; }