定義
trim - 去除字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 $character_mask = " \t\n\r\0\x0B" ] ) : string
引數 character_mask 可指定任意字符，使用..可指定一個范圍
默認去除下面五個字符
- " " (ASCII 32 (0x20)), an ordinary space - 普通空白符.
- "\t" (ASCII 9 (0x09)), a tab - 制表符.
- "\n" (ASCII 10 (0x0A)), a new line (line feed) - 換行符.
- "\r" (ASCII 13 (0x0D)), a carriage return - 回車符.
- "\0" (ASCII 0 (0x00)), the NUL-byte.
- "\x0B" (ASCII 11 (0x0B)), a vertical tab - 垂直制表符.
示例
trim($text, " \t.");
trim($hello, "Hdle");
// (from 0 to 31 inclusive)
trim($binary, "\x00..\x1F");
參看
類似函式，ltrim(),rtrim()
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標籤：PHP
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