mb_trim

(PHP 8 >= 8.4.0)

mb_trimStrip whitespace (or other characters) from the beginning and end of a string

说明

mb_trim(string $string, string $characters = null, string $encoding = null): string

Performs a multi-byte safe trim() operation, and returns a string with whitespace stripped from the beginning and end of string. Without the second parameter, trim() will strip these characters:

  • " ": ASCII SP character 0x20, an ordinary space.
  • "\t": ASCII HT character 0x09, a tab.
  • "\n": ASCII LF character 0x0A, a new line (line feed).
  • "\r": ASCII CR character 0x0D, a carriage return.
  • "\0": ASCII NUL character 0x00, the NUL-byte.
  • "\v": ASCII VT character 0x0B, a vertical tab.

参数

string
The string that will be trimmed.
characters
Optionally, the stripped characters can also be specified using the characters parameter. Simply list all characters that need to be stripped. With .. it is possible to specify an incrementing range of characters.
encoding
The string encoding.

返回值

The trimmed string.

参见

  • mb_ltrim() - Strip whitespace (or other characters) from the beginning of a string
  • mb_rtrim() - Strip whitespace (or other characters) from the end of a string
  • trim() - 去除字符串首尾处的空白字符(或者其他字符)