Question

php数组循环输出的时候，怎样去掉最后的逗号？

<?php
$arr = array("张三","李四","王五","赵六");
$arr1="";
foreach($arr as $key=> $value)
{
$arr1.='"'.$value.'"'.',';
}
echo $arr1;
?>
输出结果是：

字符串连接之后，我不想输出“赵六”后面的逗号，怎样实现？

Answer 1

1、在循环体外去掉即可：
{php $modulShow = substr($modulShow,0,-1)}
2、用if语句判断一下：
public class If {
public static void main(String[] args) {
String[] hobbys = { "sports","game","movie"};
System.out.println("循环输出数组中的元素的值");
for (int i = 0;i<hobbys.length;i++){
if(i<(hobbys.length-1)){
System.out.print(hobbys[i]+",");
}else{
System.out.print(hobbys[i]+"");
}
}
}
}

Answer 2

$arr1 = trim($arr1,','); //移除首尾的逗号
echo $arr1;