再开帖请教.和+

Question

<?php$aaa=0;
 for($i = 0; $i < 4; $i++)
        {
$aaa+=check_brand_id("5","3","10","1");
        }
print($aaa);
function check_brand_id($bid)
{
$count=0;
$arrayL=array("1","2","3","4","5","6","7","10","13","36","39","43");
for($i=0;$i<count($arrayL);$i++)
{
if($arrayL[$i]==$bid)
{
$count++;
}
}
return $count;}
?>从上面例子来看会打印出字符4，如果我把$aaa+=check_brand_id("5","3","10","1");
改成$aaa . =check_brand_id("5","3","10","1");
则会打印出01111.求解。

Answer 1

删帖是因为知道答案了。
靠了，有人告诉我PHP里面没有加号。只有.  误人子弟啊

Answer 2

+是数值计算符号  echo 1+2;  //3.是字符串连接符号 echo 1 . 2;//注意空格 结果 12

Answer 3

.链接字符串
+js的链接操作符，在php中是相加符号

Answer 4

顺便说一下：function check_brand_id($bid)这样也能用吗？
check_brand_id("5","3","10","1");

Answer 5

是可以的。只取第一个参数。
其它参数可以利用func_get_args来获取。

Answer 6

参数可以多写指的是check_brand_id("5","3","10","1");传进去的参数吗？