PHP 8.4.0 RC3 available for testing

    mb_trim

    (PHP 8 >= 8.4.0)

    mb_trim — Strip 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 32 (0x20)), an ordinary space.
    • "\t" (ASCII 9 (0x09)), a tab.
    • "\n" (ASCII 10 (0x0A)), a new line (line feed).
    • "\r" (ASCII 13 (0x0D)), a carriage return.
    • "\0" (ASCII 0 (0x00)), the NUL-byte.
    • "\v" (ASCII 11 (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）

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