PHP trim()函数详解
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2022-03-25 17:52:14
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 参数 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 " " (ASCI ......
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()
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