php trim() 是否删除换行符？
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Does php trim() remove line breaks?
提问by muncherelli
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)?
我正在创建一个从磁性阅读器“刷卡”的应用程序。从磁性阅读器返回的字符串在文本后有一个换行符。我可以使用 php trim() 删除换行符（显然是任何前后空格）吗？
回答by Pekka
Yes it does, see the manual:
是的，请参阅手册：
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)), 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.
此函数返回一个字符串，其中从 的开头和结尾去除了空格
str。如果没有第二个参数，trim()将剥离这些字符：
" "(ASCII 32 (0x20))，一个普通的空格。"\t"(ASCII 9 (0x09))，一个制表符。"\n"(ASCII 10 (0x0A))，换行（换行）。"\r"(ASCII 13 (0x0D))，回车。"\0"(ASCII 0 (0x00))，NUL 字节。"\x0B"(ASCII 11 (0x0B))，一个垂直制表符。
回答by Petah
Also note: trim($string, "\n")or trim($string, " ")
另请注意：trim($string, "\n")或trim($string, " ")
回答by Snowman
Note that trim will not remove it by default, if it has breakline: <br>at the end, so be careful with that.
请注意，默认情况下修剪不会删除它，如果它breakline: <br>在最后，所以要小心。
Otherwise @Pekka's @Petah's answer is good.
否则@Pekka 的@Petah 的回答很好。
