PHP trim()函数详解

2021-03-26 01:24

阅读：490

标签：制表符 0x0d strip 五个 feed binary rri 垂直 The

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

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.

trim($text, " \t.");
trim($hello, "Hdle");
// (from 0 to 31 inclusive)
trim($binary, "\x00..\x1F");

类似函数，ltrim(),rtrim()

PHP trim()函数详解

标签：制表符 0x0d strip 五个 feed binary rri 垂直 The

原文地址：https://www.cnblogs.com/jiaoran/p/12643589.html

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