定义
trim - 去除字符串里的空白符及其他指定字符
Strip whitespace (or other characters) from the beginning and end of a string
描述
trim ( string $str [, string $character_mask = "\t\n\r\0\x0B" ] ) : string
参数 character_mask 可指定任意字符, 使用.. 可指定一个范围
默认去除下面五个字符
"" (ASCII 32 (0x20)), an ordinary space - 普通空白符."\t"(ASCII 9 (0x09)), a tab - 制表符."\n"(ASCII 10 (0x0A)), a new line (line feed) - 换行符."\r"(ASCII 13 (0x0D)), a carriage return - 回车符."\0"(ASCII 0 (0x00)), the NUL-byte."\x0B" (ASCII 11 (0x0B)), a vertical tab - 垂直制表符.
示例
- trim($text, "\t.");
- trim($hello, "Hdle");
- // (from 0 to 31 inclusive)
- trim($binary, "\x00..\x1F");
参看
类似函数, ltrim(),rtrim()
来源: http://www.bubuko.com/infodetail-3495206.html