php trim()是否删除换行符? [英] Does php trim() remove line breaks?

问题描述

我正在创建一个应用程序，该应用程序需要从磁读取器中刷卡".从磁性阅读器返回的字符串在文本后有换行符.我可以使用php trim()删除换行符(以及显然的任何前置或后置空格)吗?

I am creating an application that takes a "swipe" from a magnetic reader. The string that is returned from the magnetic reader has a line break after the text. Can I use php trim() to remove the linebreak (and obviously any pre or post whitespace)?

推荐答案

是的，请参见手册:

此函数返回从str的开头和结尾去除空格的字符串.如果没有第二个参数，trim()将删除这些字符:

This function returns a string with whitespace stripped from the beginning and end of str. Without the second parameter, trim() will strip these characters:

" "(ASCII 32(0x20))，普通空格.
"\t"(ASCII 9(0x09))，一个制表符.
"\n"(ASCII 10(0x0A))，换行(换行).
"\r"(ASCII 13(0x0D))，回车符.
"\0"(ASCII 0(0x00))，NUL字节.
"\x0B"(ASCII 11(0x0B))，一个垂直制表符.

" " (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.
"\x0B" (ASCII 11 (0x0B)), a vertical tab.

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