How to remove the last comma in php
php删除最后一个逗号的方法:首先创建一个PHP示例文件;然后定义一个末尾带有逗号的字符串;最后通过“rtrim($str, ",");”方法删除最后一个逗号即可。
本文操作环境:windows7系统、PHP7.1版,DELL G3电脑
去除最后一个逗号:
$str = "a,b,c,d,"; echo rtrim($str, ",");
返回的结果就是:
a,b,c,d
rtrim() 函数
rtrim() 函数移除字符串右侧的空白字符或其他预定义字符。
相关函数:
ltrim() - 移除字符串左侧的空白字符或其他预定义字符
trim() - 移除字符串两侧的空白字符或其他预定义字符
语法
rtrim(string,charlist)
参数
string 必需。规定要检查的字符串。
charlist
可选。规定从字符串中删除哪些字符。如果省略,则移除下列所有字符:
"\0" - NULL "\t" - 制表符 "\n" - 换行 "\x0B" - 垂直制表符 "\r" - 回车 " " - 空格
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